Forum: Performance Modifications

First post here. Truck is a 2005 Hummer H2. Currently has a stock motor with long tube headers, no cats, cat back Magnaflow, and CAI. The ECM...

Hi all. Got a 4.8 with 3.23 gears, tows like crap! Gears down on 5% grade with just me in the truck! Ive grown attached to her so buying a different...

I have looked around and no one seems to have an rough general idea. I have an 03 Tahoe with 4.8 and long tubes and full exhaust. I want the...

Hey everyone just wanted to see if I could get the part # for the walbro fuel pump for my 05 with a ls2. Maybe the aeromotive pump also if you...

Hey guys, got an '04 Silverado 2wd 6 lug and interested in upgrading/ converting to bigger brakes. I have a hydroboost planned so that's not an...

Hello I’m building a 2002 lm7 5.3 and I’m putting 2010 243 heads on it what studs do I need for the heads? The same length ones or different length...

Hello, I am rebuilding my 4L60E trany after a clamp broke on my cooler line and I lost all my fluid and 3-4 gear. Thinking about putting in a new...

Has anyone swapped a front sway bar from a 3500 (36.2mm) in place of the 1500 (34mm) front sway bar? I've seen only one other person swap in the rear...

What shocks are you using with 4/6 drop? I need to replace the KYB's on my truck.

For a turbocharged 5.3 everyday street truck with Gen4 rods---If you had either the 4.8 or 5.3 piston sitting on the work bench---Which ones would...

Ok guys I know there's probably a thousand threads on this but here's another, sorry! Ok I swapped this truck from a 4.3 to a 4.8 a few years...

Like the title says- just bought a 05 rcsb with 4.3 and 5 speed - I've got a 2003 Tahoe 5.3 complete to swap in...but cant seem to just swap it in....

Any suggestions for a cat delete setup? I have a 04 2500hd 4x4. I'm mainly looking for a cat delet kit, but am not opposed to long tube headers if...

first got a 2013 single cab Silverado 5.3, cat back and CAI with a custom tune best time 14.4, been looking for a cam...basically something I that...

What is the stock specs for the injectors for my 2000 5.3 in a Z71 1500? and is it possible to give it a little more hp by increasing the fuel flow...

Has anyone else improved their MPG and Power by heating their fuel?? I have seen about a 20% improvement in MPG's. Gasoline vaporizes at 140...

Good all! I have an opportunity to purchase a used LS6 cam kit that I want to use in a turbo 5.3 setup, BUT I don't know the guy personally and...

Is the LSA cam a good choice for a 600whp turbo 5.3L motor? I found this guy that has a used 09 Z07 factory cam set and this new LSA cam set for...

I have a 01 shortbed and want to drop it so question is spindles or coil springs ?what is my best options alignment and tire wear .Im not looking to...

I have been looking for a street truck forum since I got my new toy. I just bought a 2002 rcsb with a 5.3,3:73 gears and a heavy duty locking rear....