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Description
5.3L 328ci / 363ci Rotating AssemblyTurn your standard 5. 3L engine into a forged 328ci OR 363ci forged built engine! Our LSX Performance Parts rotating assemblies are designed using the highest quality engine internals to upgrade your standard internals to maximises your engines serious horsepower & torque capabilities. Not only are you adding huge gains in power, You are also upgrading your entire engines bottom end to the strongest & most reliable performance products on the market.
Turn your standard 5.3L engine into a forged 328ci OR 363ci forged built engine!Our LSX Performance Parts rotating assemblies are designed using the highest quality engine internals to upgrade your standard internals to maximises your engines serious horsepower & torque capabilities.
Not only are you adding huge gains in power, You are also upgrading your entire engines bottom end to the strongest & most reliable performance products on the market.
What Does Your New 5.3L Rotating Assembly Include?
- Your Choice of Forged 4340 Steel 3.622" stroke OR 4.00" stroke Crankshaft;
- Your Choice of Forged 4340 Steel 6.125" Conrods;
- ARP2000 Series Conrod Bolts;
- Choice of 3.799" Pistons Set;
- ACL Race Series Big End bearing set;
- ACL Race Series Main bearing set;
- Optional Balancing;
See the below HP ratings on each component offered in our kits
Planning your build will go a long way in knowing that the components you will be using are going to support & keep up with you.
If you are planning on a naturally aspirated OR boosted build under that 1,000 HP mark, You have multiple options that are priced to work within your budget & provide you with awesome quality components to achieve your goals.
If you are planning on 1,000 + HP, It is important that you select the right components that will exceed the HP you plan on producing rather than pushing beyond the HP the each manufacturer cap their rating.
Crankshaft HP Ratings:
Brand. Material. Manufacturer HP Rating.
X2i Forged 4340 1,000 HP
K1 Technologies Forged 4340 1,000 HP
Callies Compstar Forged 4340 1,000 HP
Callies 8ccw Compstar Forged 4340 1,400 HP
Conrod HP Ratings:
Brand Material. Manufacturer HP Rating
X2i Forged 4340 1,000 HP
K1 Technologies Forged 4340 1,000 HP
Callies Compstar Forged 4340 1,000 HP
Wiseco Boostline Forged 4340 1,800 HP
Oliver Speedway Forged 4340 2,000 HP
The LSX Rotating Assembly Difference
We have packaged our LSX rotating assemblies together using years of research and development to bring you the highest quality performance products with the most affordable prices.
Each brand that we offer has been proven to provide the highest grade of material, Strict quality assurance processes & designed to assist in achieving your HP goals.
All rods are held to some of the tightest accepted tolerances in the industry.
Rods are weight-matched into sets and boxed, with the rotating, reciprocating and total weights noted for convenient use in the balancing process.
All rods utilise ARP Conrod bolts which are installed and tightened to exact specifications prior to honing. This ensures accurate and repeatable bore geometry.
LSX Performance Parts offers a premium One Stop Shop service by supplying these stroker kits balanced prior to shipping - This means you save time & money on your installation by taking the guess work out of this process.
Our expert team ensures all engine balancing is done specifically for your exact combination.
Want Some More Information On Our Rotating Assemblies?
Sure! Give us a call on
(03)8595 4343
OR Simply click
Get In Touch
& schedule a time that best suits you. We will have one of our sales consultants contact you at your convenience.
Alternatively, We are available for Live Chat right now!
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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
4.6 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 4
Beautiful sturdy, cozy chair, BUT…..
Color: White, Color: White
Updated review.
I was so excited to get this chair that I jumped the gun and wrote the review prior to spending more time seated.
I only have one issue, which is the back bottom of the seat cushion. That’s a big deal. It appears so thick, fluffy and inviting, however, when I sat in it for a couple of hours it completely went flat in the back feeling like I was sitting on a board. I’m 5’4” 180 lbs, which means my feet don’t touch the floor so adding a cushion will elevate me a little more. I’m OK with that but it’s going to ruin aesthetic of the chair which is which is not ok. I do love the idea of this chair. It’s design and the color. I wish the seat cushion had a zipper, which would eliminate my issue. I’d say if you’re someone who has to spend a lot of hours in this chair, you probably won’t like it. I do like the reclining back and the foot rest. It is comfortable to lay back but that doesn’t change the issue in the back bottom of the seat cushion.
I absolutely love this chair, I didn’t want to get up. It’s beautiful and cozy. Assembly was easy as I’ve assembled chairs before. I changed the wheels to a double roller blade easy on hard wood floors. I also scotch guarded the entire chair. This chair is sturdy and well made.
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Reviewed in the United States on February 25, 2026
★★★★★ 5
just get it and stop second guessing
Color: White, Color: White
I reallllly love this chair. I almost talked myself out of it because of some of the bad reviews here and there but i’m glad i listened to a majority of the good reviews, because this chair is perfect.
shipping: it was super fast. it came 5 days earlier than expected. I got it on a Monday when it said it’d be here on Friday
packaging: double boxed and bubble wrapped. Didn’t find any dings or scratches on anything. all parts were there including instructions
assembly: my boyfriend put it together in 40 minutes. We didn’t have any issues zipping up the back cover like other reviews said and he said it was easy instructions to follow, and easy to put together.
size and comfort: it’s bigger than the pictures let on! I’m 5’3 135lbs and feel like I’m sitting on a giant cloud. The comfort is 10/10. I just had a chair with basicslly zero butt cushion which i cannot have while working from home 8+ hrs a day in a chair. Comfort was the most important for me and I finally can’t feel the flat seat under me. I can’t express how comfy it is.
Functions: can move the arm rests up and down. adjust the back to tilt all the way back to a sleeping position or fully upright which i didn’t even realize was a function! The only thing with the armrests; if you’re wanting your pet on it (like advertised) when the arm rests is put down there is a big gap that isn’t comfortable for animals (as pictured) so I have to put a blanket or pillow there for my small dog to lay comfortably.
I’m obsessed with the fact I can sit cross legged, normally, laying down, sprawled up, or legs up. I have room to sit however I want, and the foot rests helps a ton with feeling even more comfortable.
Overall, I’d get this chair 10x over. Not only do I work from home and spend hours in a chair, but I spend additional time playing video games so a good quality chair is very important to me. This has began to help fix my posture and back and neck issues.
Get it!!!
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Reviewed in the United States on February 24, 2026
★★★★★ 5
If You Sit Weird Like Me… Just Buy This Chair
Color: Galaxy Black
I work from home and spend a lot of time sitting for hobbies like Legos, PC games, and crafts—so a comfortable chair is a must. I LOVE this chair so far.
I’ve always struggled to get comfortable in traditional office chairs, and the ability to move around is really important to me. With this one, I can easily cross my legs, use the footrest to stretch out with my knees bent, or just sit normally. I’m 5’4”, so my feet don’t quite touch the ground, but that doesn’t bother me since I’m constantly switching positions anyway.
I’ll probably add a small pillow for extra back support and maybe fold a blanket for a bit more seat cushioning. It’s comfortable overall, but after long periods of sitting, you might start to feel it.
The black sparkle version is MUCH cuter in person, and I’m so glad I went with it. A lot of reviews say, “don’t think about it, just get it”—and honestly, they’re right. I debated for a couple weeks before buying, and I have zero regrets.
Assembly was easier than I expected. I tend to get frustrated putting things together, but this was pretty painless. One tip: check inside the cushioned back piece for the extra headrest part—you’ll need it to attach to the hard back before inserting it into the cushion. Once I figured that out, the rest was simple.
The chair is a bit larger than a standard office chair and can feel a little bulky depending on your desk setup, but I actually like the extra space since I move around a lot while sitting.
It feels sturdy and well-made. It’s also slightly warmer than a mesh chair, which I personally love because I’m always cold.
I am just happy to find a chair that feels comfortable like a recliner and movable like an office chair.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Great chair
Color: Pink
I love this chair! I use it for streaming and working on making jewelry! It’s very comfortable and I love that I can sit different ways in it! I can stream longer than I could in other computer chairs I’ve had! I definitely recommend this if you have to sit for a long time but like to sit in different positions! The instructions were a bit confusing but I did figure it out! I have had to spot clean it a few times because of kids and pets but the material has held up! The back is very comfortable and supportive! I like that I can adjust it! Great chair for the price! It’s held up well and I like that you can adjust the back!
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Reviewed in the United States on June 11, 2026
★★★★★ 4
Good office chair for the money
Color: White
It is a good quality chair that is comfortable and aesthetically pleasing.
The arms aren't necessarily big enough to hold our cat - but that's because he's fairly large by cat standards. The arm rests moving is definitely nice and provides lots of opportunities to 'setup the chair' in a way that works best for you.
The instructions were relatively easy to follow (take your time and think it through to make sure you have everything 'aligned right' at first) and the chair is sturdy and holding up well.
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Reviewed in the United States on April 17, 2026