What would be a better improvment headers or gears. I have 3.08 right now and I have a hooker cat back. I want headers cuz they'll clean up my engine compartment, but my rear axle seals leaking right now. So what would you guys do?

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Blue 1989 TA
305 TBI
5 Spd.

 

gears, 3.73s are great for the 5 spd cars

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1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
http://www.geocities.com/firebird/myfirebird.html
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1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops

 

I would go with 3.73 posi before headers. It's been proven that your car will run lean with stock eprom, headers, and open element when your not in closed loop. SO if you go with headers, think about a custom eprom OR bump up the fuel pressure slightly.

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, Jon (350 TBI!)
91 Red My website

 

Definitly agree with these guys. I put 3.42 in my 5 speed and man, it really woke it up and made if fun to drive.I think the 3.73 are too much for the relaivily low reving LO3 but thats my opinion. The gears along with the ultimate/open element air filter were the best mods I made to my 305 . Remember you will have to change the drive and driven gears on your speedo if you want to correct for the new gears. ON a t-5 its a real PITA. There is a thread in the archives on which color gears to use so check it out............bob

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91 camaro RS convert,GM crate 350 with LT1 cam,edelbrock 6085 heads,9.5:1 comp, edelbrock TBI intake, 65# injectors, GM cop chip,dual fan conversion,
ultimate TBI mods,TBI spacer,SLP 1 5/8 headers,
3"cat back,Flowmaster,
T-5, centerforce 2 clutch, 3.42 torsen posi,alston SFC's,Global West LCA relocation brackets, edelbrock STB

 

Rear end. Cause on my car I put a new Rear end off an IROC. Has 3.27w/posi. And it improved my time by .5-.6! Before I had a 2.73w/o posi.

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Chris
91 RS 305 TBI
Eternal Rev

 

Definantly gears. 2.56-3.73 dropped me about a second. Exhuast and did it about another second. TBI and manifold and tuning got me another second.

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69 Chevelle 2dr hardtop blue, bench seats, 12 bolt w/3.73's muncie 4 speed. best 14.5@90