Forum: Performance Modifications

I have all 3 in running stock condition the 4.8 and 5.3 in daily drivers. the 6.0 on a enginge stand bc im slowly buying up parts to build it the way...

Just curious if any of you guys have relocated the coil packs off of the valve cover to somewhere else. I would like to do this on my truck and I’m...

Hey guys! I would like advice on performance parts for my application. I am installing a 2001 LM7 5.3 and 4L60E into my 1965 GMC truck. (3500lbs,...

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...

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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...