[85S10358]

What size Valve Seats do i buy for a 1.5 Exhaust valve?
im gonna run double humps and need to put hardened exhaust seats in for unleaded gas, and do u need to run Hardened Intake seats as well?

 

[camaro1986z28]

not 100% sure on the seat size but wouldn't the machine shop that you have then installed at know? they've probly got what you need in stock.