Engines and Components› Camshafts and Valvetrain
Manley Performance
Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem
SKU: M004 11775-8
Easy — 1–2 hours
Description
Each valve measures 1.9 inches in head diameter and has a 0.3415-inch stem diameter. The overall length is 5.522 inches, with a tip length of 0.25 inches and an installed height that is 0.1 inches longer than stock. The valves include swirl-polished under-head areas and fully machined combustion faces. This set includes 8 valves.
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
| Brand | Manley Performance |
| Part Number | M004 11775-8 |
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