Biggest Performance Increase?
But headers vs gears gain depends on three things:
- What gears you have now (2.73 vs 3.23)
- What tires you'll be racing on
- What sort of 1/4 gains are you looking for most (ET reduction or trap speed increase)
And looking at his sig, it's a stock car with only very basic bolt-ons. In that application, an LS6 intake will probably show near zero gains at the track, and certainly MUCH less gains than headers or gears.
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If you don't do a converter, IMO, you are wasting your time.
I personally don't care for Yank too much... My favorite is PTC with VIG being a close second.
ORY: 120
Vette o2: 100 (or o2 extensions which I dont recommend) 50 IIRC
cutout: 30+welding
Pick up a used converter either brand new in the box or used for 1000 miles or something similar: 500
transmission cooler: 60
You will pick up maybe mabe .3 with LTs/ORY
You will pick up a minimum of .5 with a decent converter.. Depending on the size you could knock off almost a full second.
For the money and/or performance gain nothing competes with an A4.
My buddy and I have nearly identical mods.... he has a stock auto trans, i got my M6 with short throw shifter. I run 12.7@108 best, vs his low 13's@10X (cant recall exact time, but its def in the 13's). You be the judge on why I am faster.

And I have had 2 Yanks on a LS car and a Vig on my old LT car and Yank ROCKS but there are other good vertors out there. There are some shitty ones too so just do your research......
Drag radials would be my first mod. Even if it is an extra set of rims with radials on it. If you don't have traction power means nothing.





