SKU: 299900313

1759VBP GEN I SBC with Vortec Bypass Port

$170.10 $189.00
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Description

1759VBP GEN I SBC with Vortec Bypass PortMore Power. More Heat! Flowkooler pump 1759VBP is designed for Gen I SBCs with Vortec heads. Unlike internal bypass passages found in older blocks the Vortec blocks and heads do not have the internal bypass passages so the the coolant bypass is an external hose connection from the water pump to the intake manifold. You run a bypass hose from a bung on the top rear of the water pump to a matching threaded port on the intake manifold to ensure

More Power. More Heat!

Flowkooler pump 1759VBP is designed for Gen I SBCs with Vortec heads.  Unlike internal bypass passages found in older blocks the Vortec blocks and heads do not have the internal bypass passages so the the coolant bypass is an external hose connection from the water pump to the intake manifold. You run a bypass hose from a bung on the top rear of the water pump to a matching threaded port on the intake manifold to ensure continuous coolant circulation while the engine is cold.

What do you do if the bypass bung in your present pump is not there? Well we have you covered. We drill and thread a 3/8" threaded bypass hole to feed the coolant to the rear of the Vortec heads.  The increased flow will help improve circulation to overcome the increased resisistance inherent in added lines. 

The pump has a 16 blade skip vane impeller that is CNC machined from billet aluminum.  An increased vane count and a reduction in the plate-impeller clearance achieves greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps.  It is then surface coated with a military grade type II Class II anodized finish. 

FlowKooler introduced the first hi flow pumps for the ZZ4 and continues to improve impeller design. Why is increased flow so important to cooling a hot small block engine? Because it has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures.

Read about resolving the Vortec engine temperature spike 

From 0-3,300 RPM…Nothing Beats a FlowKooler!

General Specifications:
Type of Material of Pump Body Cast Iron
Number of Blades on Impeller 16 CNC Aluminum
Direction of Rotation CW or CCW
Fan Hub Working Height 6-7/8" (long)
Shaft Diameter 5/8"
Pulley Bolt Pattern 1 1/2" adjacent  & 2 1/8" across
Power Steering boss Yes - 3/8" through hole driver side
Alternator Boss Yes - 3-3/8" threaded mounts
Hose Connections 1st 2nd
Gender F F - for vortec heads
Diameter 5/8" 3/8" NPT
Threaded Yes Yes
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller that is protected with military grade anodized surface coating
  • Fits General Motors products with TBI
  • This pump has an un-threaded PS boss. 1987-1995 SBC should purchase 1774 without the power steering boss
  • Images show a brass reducer to illustrate the location.  This is not included.
  • Pay attention! We cannot warranty a cracked casting if you overtighten the port.
  • Alternative Part Numbers 10049026, 12307863, 12522016, 31228, 364790, 372334, 384780, 3853692, 3859632, 3957932, 3998198, 474028, 6272157
Parts Contained in Box:
Mounting Gasket, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
CHECKER DELUXE 76-69 V8 307 5.0L
CHECKER DELUXE 76-69 V8 350 5.7L
CHECKER MARATHON 70-69 V8 307 5.0L
CHECKER MARATHON 76-69 V8 350 5.7L
CHEVROLET BEL AIR 1969 V8 327 5.3L
CHEVROLET BEL AIR 1969 V8 327 5.4L
CHEVROLET BEL AIR 75-69 V8 350 5.7L
CHEVROLET BEL AIR 75-70 V8 400 6.6L
CHEVROLET BISCAYNE 1969 V8 327 5.3L
CHEVROLET BISCAYNE 1969 V8 327 5.4L
CHEVROLET BISCAYNE 72-69 V8 350 5.7L
CHEVROLET BISCAYNE 72-70 V8 400 6.6L
CHEVROLET BLAZER 73-72 V8 307 5.0L
CHEVROLET BLAZER 76-72 V8 350 5.7L
CHEVROLET BLAZER 76-75 V8 400 6.6L
CHEVROLET BROOKWOOD 1969 V8 327 5.3L
CHEVROLET BROOKWOOD 71-69 V8 307 5.0L
CHEVROLET BROOKWOOD 72-69 V8 350 5.7L
CHEVROLET BROOKWOOD 72-70 V8 400 6.6L
CHEVROLET C10/C1500 PICKUP 1973 V8 307 5.0L
CHEVROLET C10/C1500 PICKUP 1976 V8 402 6.6L
CHEVROLET C10/C1500 PICKUP 76-74 V8 350 5.7L
CHEVROLET C1500 SUBURBAN 1973 V8 307 5.0L
CHEVROLET C1500 SUBURBAN 1976 V8 307 5.0L
CHEVROLET C1500 SUBURBAN 76-73 V8 350 5.7L
CHEVROLET C20/C2500 PICKUP 1973 V8 307 5.0L
CHEVROLET C20/C2500 PICKUP 1976 V8 402 6.6L
CHEVROLET C20/C2500 PICKUP 76-73 V8 350 5.7L
CHEVROLET C2500 SUBURBAN 1973 V8 307 5.0L
CHEVROLET C2500 SUBURBAN 1976 V8 307 5.0L
CHEVROLET C2500 SUBURBAN 76-73 V8 350 5.7L
CHEVROLET C30 PICKUP 1973 V8 307 5.0L
CHEVROLET C30 PICKUP 1976 V8 402 6.6L
CHEVROLET C30 PICKUP 76-73 V8 350 5.7L
CHEVROLET CAMARO 1969 V8 327 5.3L
CHEVROLET CAMARO 1969 V8 327 5.4L
CHEVROLET CAMARO 1970 V8 396 6.5L
CHEVROLET CAMARO 1976 V8 305 5.0L
CHEVROLET CAMARO 69-68 V8 302 4.9L
CHEVROLET CAMARO 72-69 V8 400 6.6L 2 carb small block
CHEVROLET CAMARO 73-69 V8 307 5.0L
CHEVROLET CAMARO 76-69 V8 350 5.7L
CHEVROLET CAPRICE 1969 V8 327 5.3L
CHEVROLET CAPRICE 1969 V8 327 5.4L
CHEVROLET CAPRICE 71-69 V8 307 5.0L
CHEVROLET CAPRICE 76-69 V8 350 5.7L
CHEVROLET CAPRICE 76-70 V8 400 6.6L2 carb small block
CHEVROLET CAPRICE 90-86 V8 307 5.0L
CHEVROLET CHEVELLE 1976 V8 305 5.0L
CHEVROLET CHEVELLE 73-69 V8 307 5.0L
CHEVROLET CHEVELLE 76-69 V8 350 5.7L
CHEVROLET CHEVELLE 76-70 V8 400 6.6L 2 carb small block
CHEVROLET CHEVY II 1969 V8 307 5.0L
CHEVROLET CHEVY II 1969 V8 350 5.7L
CHEVROLET EL CAMINO 1976 V8 305 5.0L
CHEVROLET EL CAMINO 73-69 V8 307 5.0L
CHEVROLET EL CAMINO 76-69 V8 350 5.7L
CHEVROLET EL CAMINO 76-72 V8 400 6.6L
CHEVROLET G10/ G1500 VAN 1972 V8 307 5.0L
CHEVROLET G10/ G1500 VAN 1976 V8 400 6.6L
CHEVROLET G10/ G1500 VAN 78-72 V8 350 5.7L
CHEVROLET G20/ G2500 VAN 1972 V8 350 5.7L
CHEVROLET G20/ G2500 VAN 72-71 V8 307 5.0L
CHEVROLET G20/ G2500 VAN 76-75 V8 350 5.7L
CHEVROLET G20/ G2500 VAN 76-75 V8 400 6.6L
CHEVROLET G30/ G3500 VAN 76-72 V8 350 5.7L
CHEVROLET G30/ G3500 VAN 76-75 V8 400 6.6L
CHEVROLET IMPALA 1969 V8 327 5.3L
CHEVROLET IMPALA 1969 V8 327 5.4L
CHEVROLET IMPALA 71-69 V8 307 5.0L
CHEVROLET IMPALA 76-69 V8 350 5.7L
CHEVROLET IMPALA 76-70 V8 400 6.6L
CHEVROLET K10/1500 PICKUP 74-73 V8 307 5.0L
CHEVROLET K10/1500 PICKUP 76-73 V8 350 5.7L
CHEVROLET K10/1500 PICKUP 76-75 V8 400 6.6L
CHEVROLET K10/K1500 SUBURBAN 1973 V8 307 5.0L
CHEVROLET K10/K1500 SUBURBAN 76-73 V8 350 5.7L
CHEVROLET K10/K1500 SUBURBAN 76-75 V8 400 6.6L
CHEVROLET K20/K2500 PICKUP 76-73 V8 350 5.7L
CHEVROLET K20/K2500 PICKUP 76-75 V8 400 6.6L
CHEVROLET K20/K2500 SUBURBAN 1973 V8 307 5.0L
CHEVROLET K20/K2500 SUBURBAN 76-73 V8 350 5.7L
CHEVROLET K20/K2500 SUBURBAN 76-75 V8 400 6.6L
CHEVROLET K30/K3500 PICKUP 1973 V8 305 5.0L
CHEVROLET K30/K3500 PICKUP 76-73 V8 350 5.7L
CHEVROLET K5 BLAZER 76-75 V8 350 5.7L
CHEVROLET K5 BLAZER 76-75 V8 400 6.6L
CHEVROLET KINGSWOOD 1969 V8 327 5.3L
CHEVROLET KINGSWOOD 1969 V8 396 6.5L
CHEVROLET KINGSWOOD 70-69 L6 250 4.1L
CHEVROLET KINGSWOOD 71-69 V8 307 5.0L
CHEVROLET KINGSWOOD 72-69 V8 350 5.7L
CHEVROLET KINGSWOOD 72-70 V8 400 6.6L
CHEVROLET LAGUNA 76-73 V8 305 5.0L
CHEVROLET LAGUNA 76-73 V8 350 5.7L
CHEVROLET LAGUNA 76-73 V8 400 6.6L
CHEVROLET MALIBU 1973 V8 307 5.0L
CHEVROLET MALIBU 1976 V8 307 5.0L
CHEVROLET MALIBU 76-69 V8 350 5.7L
CHEVROLET MALIBU 76-73 V8 350 5.7L
CHEVROLET MALIBU 76-73 V8 400 6.6L
CHEVROLET MONTE CARLO 1976 V8 305 5.0L
CHEVROLET MONTE CARLO 76-70 V8 350 5.7L
CHEVROLET MONTE CARLO 76-70 V8 400 6.6L
CHEVROLET NOVA 1975 V8 262 4.3L
CHEVROLET NOVA 1976 V8 305 5.0L
CHEVROLET NOVA 73-69 V8 307 5.0L
CHEVROLET NOVA 76-69 V8 350 5.7L
CHEVROLET P10 VAN 1973 V8 307 5.0L
CHEVROLET P10 VAN 75-73 V8 350 5.7L
CHEVROLET P20 VAN 1973 V8 307 5.0L
CHEVROLET P20 VAN 74-72 V8 350 5.7L
CHEVROLET P20 VAN 76-75 V8 350 5.7L
CHEVROLET P30 VAN 1976 V8 400 6.6L
CHEVROLET P30 VAN 70-69 L3 159 2.6L
CHEVROLET P30 VAN 73-72 V8 307 5.0L
CHEVROLET P30 VAN 76-72 V8 350 5.7L 1972 w/ 4 BBL carb
CHEVROLET TOWNSMAN 1969 L6 250 4.1L
CHEVROLET TOWNSMAN 1969 V8 327 5.3L
CHEVROLET TOWNSMAN 71-69 V8 307 5.0L
CHEVROLET TOWNSMAN 72-69 V8 350 5.7L
GMC C15/C1500 PICKUP 1973 V8 307 5.0L
GMC C15/C1500 PICKUP 1976 V8 307 5.0L
GMC C15/C1500 PICKUP 76-73 V8 350 5.7L
GMC C15/C1500 SUBURBAN 1973 V8 307 5.0L
GMC C15/C1500 SUBURBAN 1976 V8 305 5.0L
GMC C15/C1500 SUBURBAN 76-73 V8 350 5.7L
GMC C25/C2500 PICKUP 1973 V8 307 5.0L
GMC C25/C2500 PICKUP 76-73 V8 350 5.7L
GMC C25/C2500 SUBURBAN 1973 V8 307 5.0L
GMC C25/C2500 SUBURBAN 76-74 V8 350 5.7L
GMC C35/C3500 PICKUP 1973 V8 307 5.0L
GMC C35/C3500 PICKUP 76-73 V8 350 5.7L
GMC G15/G1500 VAN 73-72 V8 307 5.0L
GMC G15/G1500 VAN 76-72 V8 350 5.7L
GMC G25/G2500 VAN 73-72 V8 307 5.0L
GMC G25/G2500 VAN 76-72 V8 350 5.7L
GMC G25/G2500 VAN 76-75 V8 400 6.6L
GMC G35/G3500 VAN 73-72 V8 307 5.0L
GMC G35/G3500 VAN 76-72 V8 350 5.7L
GMC G35/G3500 VAN 76-75 V8 400 6.6L
GMC JIMMY 1972 V8 307 5.0L
GMC JIMMY 1976 V8 305 5.0L
GMC JIMMY 76-73 V8 350 5.7L
GMC JIMMY 76-75 V8 400 6.6L
GMC K15/K1500 PICKUP 1973 V8 307 5.0L
GMC K15/K1500 PICKUP 76-73 V8 350 5.7L
GMC K15/K1500 PICKUP 76-75 V8 400 6.6L
GMC K15/K1500 SUBURBAN 1973 V8 307 5.0L
GMC K15/K1500 SUBURBAN 76-73 V8 350 5.7L
GMC K15/K1500 SUBURBAN 76-75 V8 400 6.6L
GMC K25/K2500 PICKUP 1973 V8 307 5.0L
GMC K25/K2500 PICKUP 76-73 V8 350 5.7L
GMC K25/K2500 PICKUP 76-75 V8 400 6.6L
GMC K25/K2500 SUBURBAN 74-73 V8 350 5.7L
GMC K25/K2500 SUBURBAN 76-75 V8 350 5.7L
GMC K25/K2500 SUBURBAN 76-75 V8 400 6.6L
GMC K35/K3500 PICKUP 74-73 V8 350 5.7L
GMC P15/P1500 VAN 1973 V8 350 5.7L
GMC P25/P2500 VAN 1973 V8 307 5.0L
GMC P25/P2500 VAN 76-73 V8 350 5.7L
GMC P25/P2500 VAN 76-75 V8 350 5.7L
GMC P35/P3500 VAN 1973 V8 307 5.0L
GMC P35/P3500 VAN 76-73 V8 350 5.7L
GMC SPRINT 1976 V8 305 5.0L
GMC SPRINT 73-71 V8 307 5.0L
GMC SPRINT 76-71 V8 350 5.7L
GMC SPRINT 76-74 V8 400 6.6L
PONTIAC ACADIAN 1971 V8 307 5.0L
PONTIAC VENTURA 73-71 V8 307 5.0L
STUDEBAKER AVANTI II 76-73 V8 400 6.6L
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 299900313

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4.5 ★★★★★
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K
Verified Purchase
Kelly
Waukegan, US
★★★★★ 5
Love love love!
Color: Black
This replaced my Roborock and I was terrified about going to another brand. This Lefant robot is better than it--by far! So happy i took the leap! The performance is amazing (with 1 cat and 2 messy flight birds) - stays on top of it! Setting it up in the Lefant app and to Alexa was a snap. The charge in between scheduled cleanings is quick and lasts. Mapping and zoning is a cinch. My cat was scared of my old robot but isnt afraid of this one. It is pretty quiet! If you are debating on this one, you won't regret it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
P
Verified Purchase
ProvokaPhoto
Fort Morgan, US
★★★★★ 5
Decent Mopping for the Price
Color: Black
I’ve been running the **Lefant LiDAR Robot Vacuum and Mop** for at least 6 months, and overall it’s a capable cleaner with smart navigation. It handles pet hair, carpets, and hard floors well, and the large 450ml visible dustbin is a nice touch — easy to check and empty without guessing. As for the **mopping feature** specifically: it’s a basic but functional 2-in-1 mopping system with a 200ml water tank and washable mop pad. It does a respectable job on everyday light dirt, footprints, and spills on hard floors like tile or hardwood. The mop applies water evenly enough for maintenance cleaning, and you can control water flow levels through the app. It also has carpet detection that’s supposed to lift or avoid mopping rugs (which mostly works, though I still set no-mop zones for thicker carpets just in case). That said, it’s not a deep-scrubbing powerhouse — stubborn dried-on spots or heavy messes often need a second pass or manual touch-up. It’s more of a “keep the floors looking fresher between deep cleans” type of mop rather than a full replacement for hand mopping. I tend to use the mopping mode once or twice a week on low-to-medium water settings and it leaves floors noticeably cleaner without streaks when used with a good floor cleaner solution. The combo of strong vacuuming + basic mopping in one slim robot (great for getting under furniture) makes it convenient. Battery life is solid for most homes, and the app is straightforward for scheduling and customizing zones. If you’re looking for an affordable LiDAR robot that vacuums well and adds convenient light mopping without breaking the bank, this Lefant model is a good pick. Just don’t expect premium-level mopping performance (like spinning pads or self-cleaning stations on higher-end brands). Would recommend for apartments or homes with mostly hard floors and light daily dirt!
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Reviewed in the United States on April 10, 2026
R
Verified Purchase
Robert L. White
Lowell, US
★★★★★ 5
Best robovac we've ever bought. Would definitely buy again.
Color: Black
I got this on sale for half-price, but knowing how well it works, I would pay full price. Why? Because this is the best of the 4 robovacs I've ever bought. Two of the others stopped working. The third still works, but less well. The advantage of this unit for us is that its filter does not get clogged with dog hair. Different brand: Our previous vac has a roller brush that collects hair, both long hair from my girls and lots of dog hair. The slit through which the dirt and dust travels to the dust collector is too small. Eventually, it gets clogged with dog hair. Advantages of Lefant: * The design of this vac lets the dog hair enter the dust bin where it is effectively trapped by the air filter before it can reach the vacuum motor. This is the big win. * It does an excellent job of mapping out the rooms. I guess that's LiDAR at work. * You can see on the companion app where it has cleaned and how it has mapped out the rooms. It remembers. * Its obstacle avoidance and wall mapping is excellent. It tends not to get stuck, and that's a big win, too. * It goes back to base pretty well (twice I have had to situate it so it made contact with the charging contacts. Did it miss the target, or did the dog knock it off? It probably just missed). * After it charges, it starts cleaning again. The dust bin capacity is big enough that we don't have to empty it every time. And since it restarts its task until it finishes, our floors are less dusty and don't fill the bin as fast. * It's voice prompts are helpful. E.g. when it returns to base it says, "Start charging." * Installation was simple. Plug it in. Let it charge. Download the app. Press the button to start it. * Emptying the dust bin is simple. The bin is easy to clean in the kitchen sink. I can fit my hand into it to dry it with a paper towel. The instructions warn against washing the air filter. * It comes with spare parts (replacement brushes and another filter). No comment features: * I have not used the mop function, so I cannot comment. Disadvantages: * The air filter has two parts: A sturdy filter and a flimsy foam rubber pre-filter. The pre-filter catches the dog hair and it is difficult to brush the hairs off this pre-filter. We easily tore the first pre-filter and we are treating the second more delicately. Clearly, the pre-filters will have to be replaced often. I don't know if replacements are available, but I found filters for computer fans that might be cut to fit for about a buck per pre-filter. So I think of these pre-filters as a disposable part and I hope to find a more sturdy replacement. Owners without dogs may not be bothered by this. Update: Almost two months have gone by and I just love this vacuum even more. It wakes up several times a day and methodically vacuums. Then it quietly slips back to its base. This is the best appliance purchase we ever made. Update: After 5 months, I still love this gadget. Without a doubt the best appliance I have ever purchased. And I found that I can buy replacement brushes and filters. It wakes up several times a day, remembers where it left off and dutifully motors over to that spot and restarts. We have noticed how much less dusty everything is.
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Reviewed in the United States on July 6, 2025
N
Verified Purchase
nothing but the Brent
Lexington, US
★★★★★ 3
'Better than sweeping every day.
Color: Black
This vacuum is… fine. It generally cleans well enough, but honestly, I kind of wish I had spent a few more dollars on a better model. It does a decent job picking up dirt, and it’s definitely quieter than my old robot vacuum, which was loud but surprisingly effective. That old one was very basic — the kind you’d find at big box stores — and it just kept going until it bumped into something. Simple, but it got the job done. By contrast, this one is supposed to be more advanced, with LIDAR and smarter navigation. But I’m not convinced the “upgrades” are actually improvements. It has this frustrating habit of turning right, hitting an obstacle, inching forward, then turning right again — over and over. What happened to the LIDAR? That feels less like smart mapping and more like stubborn programming. It also gets stuck more often than my old Shark robot vacuum. And when it does get stuck, it’s more problematic. Instead of gently bumping into low objects and stopping, it tries to climb them and ends up wedged or tangled. It has even knocked over heavier items, which my older, simpler vacuum never did. Another annoyance: if you try to help it by sweeping debris from corners into the center, it might kick crumbs away as it passes and may or may not actually circle back to clean them up. And there’s nothing more irritating than hearing “job complete” and then immediately stepping on kitty litter it somehow missed. Overall, it’s quieter and it cleans okay — but the smarter features don’t necessarily make it better. Sometimes simple and reliable beats “advanced” and unpredictable.
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Reviewed in the United States on February 28, 2026
R
Verified Purchase
Roland S.
Lexington, US
★★★★★ 5
Absolutely the best robot vacuum. And I know!
Color: Black
I researched and read many of the reviews on the M330 Pro. I can't see how anybody would give it less than 5 stars. I have owned 5 different robot vacs. One of which I just returned because of its poor third party app which was useless. The Lefant company knows robotics. While this is my first from them, I won't hesitate to buy from them again. It is quiet, quick, and the Lefant App which is THEIR own app and not some cheap third party, is the best. Easy to understand, and navigate. The design of the vacuum is very well thought out. The M330 Pro is a brand new model (go look at their website) and the technology has improved from even a year ago. The aid of both 2G and 5G networks is something you just don't find from anyone else. For the price, this is an absolute MUST BUY. And to make the vacuum even better, the customer service from Lefant is the best.
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Reviewed in the United States on March 17, 2026

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