Engines and Components› Camshafts and Valvetrain

Manley Performance

Manley Gen II Race Series 37mm Head Dia 121.9mm Length Race Series Exhaust Valves - Set of 8

$602.10

SKU: M004 11247-8

In Stock
In Stock
Ships by Jun 21
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

Manley Performance valves are high-quality internal engine components designed for performance and racing applications. The 11247-8 is an exhaust valve, part of the Generation II series, featuring a 37mm head diameter. Manley Performance focuses on designing and producing durable components at competitive prices.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

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

Available on iOS & Android

Specifications

BrandManley Performance
Part NumberM004 11247-8

Videos

Motion Lab Built 800+awhp Subaru WRX STI

Motion Lab Built 800+awhp Subaru WRX STI

Buy with Confidence

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.

View Full Return Policy