Engines and Components› Harmonic Balancers

CHE Precision

Valvetrain Harmonic Isolator System

$369.99

SKU: CHE-3770-SM

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

It includes 8 shaft trunnions, 32 full floating bronze bushings, and 33 snap rings. The system isolates valvetrain harmonics to a single cylinder.
Show original supplier description
This kit contains 8 shaft trunnions, 32 full floating bronze bushings, and 33 snap rings. This leads to more consistent valve actuation and greater overall stability within the valvetrain. Unlike conventional shaft mount trunnion designs, the CHE Precision system isolates valvetrain harmonics to each individual cylinder. This feature contributes to improved performance and longevity of the valvetrain components. This kit is designed for LS3/L99 fitment and utilizes a bushing trunnion style. This specific kit is designed for LS3/Rectangular Cylinder Heads (CHE-3770-SM). It is compatible with all Gen 3/Gen 4 LS engines, including popular variants such as LS1, LS6, LS2, LS3, LS7, LM7, LQ4, LQ9, and Gen 4 Truck Engines. Please note that this kit does not include rocker arms; they must be purchased separately.

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

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Specifications

BrandCHE Precision
Part NumberCHE-3770-SM
CategoryEngines and Components

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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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