My friend bought a GTA awhile ago W/headers already on it. Since then he had done many performance mods. And we wanted to know how bad the headers are "hurting" him. How much of an improvement are 1 5/8 headers on a 350, over stock manifolds? Any Opinions welcome.

[This message has been edited by JR4444 (edited November 20, 2001).]

 

I have SLP 1 5/8 headers on my L98. You can see my mods in the sig. I got 1 5/8 for a few reasons, despite the fact that SLP calls for 1 3/4 on an L98.

I figured that the 1 5/8 would retain more low end power, and would still be a DRASTIC IMPROVEMENT over the stock exhaust manifolds up top anyhow. 1 5/8 should be able to support 400hp without a problem in my opinion.

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech Thermomaster chip with 160stat, MSD 6A, March Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell Universal 24# injectors

More info and pics on my webpage:http://go.to/iroc-z

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