Manley Severe Duty Exhaust Valve - 1.880 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy 11845-1 729005 Heat flux test shows 36%

Heat flux test shows 36% reduction of temperature

**(WILL NOT WORK WITH SOME OLDER STOCK CAR PRODUCTS PUMPS WITHOUT BASE ADAPTER FROM SCP BASE ADAPTER #SCP5150KSE sold separately or will work with #SCPBT204/5150KSE dry sump pump)

44 x 18 x 4-1/2 in

For use with High Energy Ignition systems and suppresses RFI (Radio Frequency Inteference)

Manley Severe Duty Exhaust Valve - 1.880 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy 11845-1 729005 Heat flux test shows 36%Product Description: Exhaust Valve Severe Duty 1. 880 in Head 0. 342 in Valve Stem 5. 522 in Long Stainless Big Block Chevy Sold Individually Manley Performance high performance and racing engine parts have been powering winners since 1966. Since our inception in March 1966, Manley Performance Products has been at the forefront of the high performance automotive industry. Founded by gearhead Hank Manley shortly after his graduation from Brown