Engines and Components› Oiling Systems

BTR

5.3 LS Stroker Rotating Assembly Kit

$1,711.98

SKU: 5.3 STROKER ROTATING ASSEMBLY

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The BTR 5.3 LS Stroker Rotating Assembly Kit is engineered for performance enthusiasts looking to enhance their GM LS engine. This kit offers a significant increase in displacement, enabling greater power output potential. Customers can customize their assembly by selecting from different bore sizes (3.800" or 3.780") and specifying a 4.000" stroke with a 6.098" rod length. The included pistons feature an 8CC dish, contributing to the overall compression ratio. The kit includes a BTR forged crankshaft available for GM 24X or 58X applications. Options for main and rod bearings from reputable brands like ACL, Clevite, and King are available, including standard and .001" extra clearance options to precisely tune oil clearances. MAHLE premium piston rings are also offered for specific bore sizes, ensuring optimal sealing and performance for 1999-2013 4.8/5.3 LS engines. Additional options for balancing the rotating assembly and break-in oil are also available to complete the build.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandBTR
Part Number5.3 STROKER ROTATING ASSEMBLY
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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