Engines and Components› Camshafts and Valvetrain

Modular Motorsports Racing (MMR)

Road Race / Drag Race Valve & Spring Kit

$3,717.99

SKU: 777528

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
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Overview

The Modular Motorsports Racing Road Race / Drag Race Valve & Spring Kit is a complete cylinder head valve train kit designed for 5.2L GT350 and GT500 engines. This kit offers significant upgrades for both road race and drag race applications, capable of handling full race duty and high RPM operation. It replaces the factory hollow stem valves, which can fail in extreme performance scenarios.
Show original supplier description
The Modular Motorsports Racing (MMR) 777528 Road Race / Drag Race Valve & Spring Kit is a comprehensive valvetrain upgrade for 5.2L GT350 and GT500 cylinder heads. Developed for the rigors of both road racing and drag racing, these components are built for full race duty and high-RPM performance. This kit directly replaces the factory hollow stem valves, which are known to be a failure point in extreme performance applications. The included components are designed as a direct fit and plug-and-play solution for all 5.2L GT350 and GT500 cylinder heads. The kit includes: * (16) Solid steel intake valves (1.51 in) * (16) Solid steel exhaust valves (1.28 in) * (32) Stiffer, unique valve springs from PAC® * (64) Valve spring keepers/keys * (32) Titanium valve spring retainers * (32) Valve stem seals

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

BrandModular Motorsports Racing (MMR)
Part Number777528
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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