Exhaust› Exhaust Pipes, Systems and Components

Manley Performance

Manley Chevy L83 5.3L 1.560in Head Diameter Pro Flo/Severe Duty Exhaust Valve (Single)

$70.76

SKU: M004 12361-1

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

It features XH-428 material construction with chrome stems and hard tips for enhanced durability. The valve also has a 1.560-inch head diameter and a 0.3136-inch stem diameter.

These valves have undergone rigorous fatigue testing, enduring up to 100 million cycles at 40,000 psi and 1400°F. This performance is significantly higher than competing products. The design includes swirl-polished under-head areas and fully machined combustion faces for improved airflow and efficiency.

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 12361-1

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