what was your single best performance mod?

[bowtiefreak]

I'd say the tune or of course the 383

[Rollin Thunder]

BB tune

[JKmotorsports]

Supercharger and BB tune.

[96ProCompTahoe]

ah, the only place i have been lacking with attention so far. exhaust and CIA have been it so far under the hood.

the best thing so far is the rebuilt trans with extreme torque package, and vette servo.

[jmildoc]

NONE... This is a freaking TANK!!!

Just kidding I love my exhaust...... probably the best benefit yet...... still have to change my 02's and my front diff fluid to amsoil too

[foreverfalcon40]

Lowering it...No Body Roll and Killer look. I actually think it helps MPGs and 1/4 mile time since its less wind resistance compared to being higher up.

All I have is a Volant CAI, Whistle Helix TB Spacer, B & M Shift Kit, and 3" Gibson Cat-Back Exhuast

Awaiting install is Rebuilt Heads with 3 Angle Valve Job and Shimmed Springs (Bump up the Compression and free air flow), MSD 6 AL Ignition Box (heard big difference in start up and adds 50 miles to a Tank, e3 Plugs.

For sum reason I REALLY REALLY LT's! with Cut Outs.

[blueflamed03]

still on the list, BB tune......

[OKLAGMCRUISER]

upd lid....so far.

[YNOT]

polished aluminum license plate bolts. :rocking:

[roadrageror]

Lowered and re-manufactured tranny with shift kit.

[YNOT]

polished aluminum license plate bolts. :rocking:
on a serious note, a custom tune. (my silverado, not tahoe yet)

[hapyspaz]

Supercharger and BB tune.

Dammit JK! You still haven't brought it by either.

[efeeloc]

i say the air filter with flowmaster next

[95TwinTT]

I would say the 4L80e trans.........:)