Severe Duty Valves Type: Exhaust

Name: Severe Duty Valves Type: Exhaust
Brand: MANLEY
SKU: 660-12343-8
Price: 301.07 USD
Availability: InStock

^$301⁰⁷

Ships on 10/21/2026

Lowest Price Guarantee

BB-Chevy with 11/32" stem

Severe Duty Valves

Type: Exhaust
Length: +.500
Head Diameter: 1.800"
Stem Diameter: .3415"
8/pkg

These valves are specifically produced for the Brodix BB-SR 20° cylinder heads. All of these valves also include a back cut. Brodix equivalents: Manley P/N 12341, 12343 = BR81080, Manley P/N 12344 = BR81403

Manley Stainless Steel Performance Valves are held to the highest standards. Swirl-polished heads, chromed stems and hardened tips provide the advantage you expect from America's premier valve manufacturer! Sold Individually or 8/pkg.

Budget Performance Replacement

For stock rebuild or mild performance applications
Superior to OE construction in every aspect

Street Flo

For street/strip applications
Fully-machined combustion faces and necked-down stems

Street Master
For bracket racer engines and street performance
Straight stems provide extra meat for outstanding durability

Race Flo
For mild drag or circle track engines and street performance
Necked-down stems for less weight and more flow

Race Master
For mild drag or circle track engines and street performance
Similar to Race Flo valves except with straight stems

Pro Flo
For drag, circle track, and hot street engines
Stainless steel undercut design for less weight and up to 40% more flow

Severe Duty
For applications with high spring pressures and high RPM
One-piece stainless steel design

Extreme Duty
For drag racing applications with 8000+ RPM
Offshore powerboat and Hi performance marine applications
Also, for engine builders using EV-8, high performance street, bracket racers, oval track and sportsman racers