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Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
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Description
Boost Compensating Universal EFI Fuel Pressure Regulator 512-504-5This precision adjustable fuel metering regulator is the ultimate fuel pressure control unit designed to work on all naturally aspirated EFI, turbo and supercharged applications like vehicles that run in the Pro Street, Pro Import and Outlaw classes. This is a 2 port 1: 1 boost compensating return style regulator that is adjustable from 15 65 PSI + boost reference and is designed to be used in conjunction with any electric EFI fuel pump. Features
This precision adjustable fuel metering regulator is the ultimate fuel pressure control unit designed to work on all naturally aspirated EFI, turbo and supercharged applications like vehicles that run in the Pro Street, Pro Import and Outlaw classes. This is a 2 port 1:1 boost compensating return style regulator that is adjustable from 15-65 PSI +
boost reference and is designed to be used in conjunction with any electric EFI fuel pump. Features built in gauge port, mounting bracket, two AN -8 O-ring fittings and a AN-6 O-ring return fitting.
Black anodized.
Features:
- Black anodized
- Easy installation
- -8an & -6an o-ring style fittings included to adapt to steel braided fuel lines
- Designed to regulate high fuel demands for naturally aspirated EFI, turbo, supercharged and nos race applications
- Engineered to regulate extreme flow volumes generated by racing fuel systems
- CNC machined billet aluminum
- Allows adjustment from 15-65 psi + boost reference
About Holley
Holley Performance Brands is the undisputed leader in carburetors, fuel pumps, fuel injection, intake manifolds, fuel injection, and fuel systems.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
My dog loves it - yours will, too
My little merle bulldog absolutely LOVES this toy! It is so cute to watch him play, chew, and toss it all around. We were worried he would chew through the material but so far that is not the case. This product is sturdy and can take a beating!
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Great glitter body spray
Color: Fairy-Diamond, Color: Fairy-Diamond
So cute. Came with extra glitter, I’m assuming lipgloss you can make into glitter lipgloss, a funnel to help pour the glitter. Or re load your spray. The spray performance is nice. Might stick better with some oil before hand? But I like it so far. Worked 6 hours and still had glitter on me for my photoshoot. I sprayed perfume and then glitter. There’s no odor. The amount of quantity of glitter you get seems good for the price. Durability seems good so far but like I said may need some oil or lotion first to help it stick all day.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Troll glitter
Color: Brandy-Rose
Do not spray too much! This glitter is so fine that it dispenses easily from the puff part and you can easily make yourself look like Poppy the troll. We had so much fun with this for prom
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Glitter with staying power
Color: Rainy-Rainbow, Color: Rainy-Rainbow
Super fun and sparkly, the color is beautiful, it comes with 2 glue tubes with brushes that you use to rub the glue onto your skin in order for the sparkle to stick better and longer, made a heart shape on my arm, dries fairly quickly and washes off easily when you're done with it
It sprays a fine layer and evenly, it's great for building on for more sparkle or to just have a light layer
Even without the glue it lasts at least a couple hours with minimal shedding and light use, seems to have good longevity
With 2 glue tubes, a refill tub, funnel and the glitter spray bottle I feel $10 is a great value considering everything you get with it, Overall I feel like it's a fantastic product and will buy again!
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Reviewed in the United States on July 22, 2025
★★★★★ 5
Super super glittery!
Color: Fairy-Diamond
Super, super glittery! I ended up returning because, believe it or not, it was too glittery for me! But it's a good product :)
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Reviewed in the United States on April 19, 2026