Here are the details. I have a 91' Z28,L98. Dual Cats. Every thing else is stock except for Flowmaster, Airfoil. Planning to change out heads, manifold and runners later. What size headers should I use? 1 3/4 or 1 5/8? I was going to go with nickel plated TES Edlebrock in 1 5/8. I don't think they make a 1 3/4. My other choice if I go 1 3/4 is SLP. Will this be to much heat under the hood? Need to keep it smog legal.
Please give me insight.
thanks.

 

Well, I would go with the 1 5/8" headers because they seem to be better for torque. My brother has SLP 1 5/8" headers on his 1987 Monte Carlo Aero Coupe with a 406 under the hood and man does it haul !!

Auggie

 

305 = 1 5/8
350 = 1 3/4

SLP headers w/ AIR are the ones that you want if you need to stay smog legal.

 

Definately go with 1 3/4" if you plan on doing some serious modding later on.

 

does anyone other than SLP make a 1 3/4 shorty header?

 

haven't seen any yet.