Forum: Performance Modifications

Haven't been able to find information on weather i can run E85 or not on a 2009 GMC sierra 4.8. In HP tunersit does have a section for flex fuel and...

so im new to this and trying to build my motor right. i have a 5,3 with 799 heads. im pulling the motor to put in LQ4 block bored 30 over forged...

OK here goes.. why not replace the stock 2004 gmc5.3 pump witha E85 pump to get more flow right..afterall E 85 needs more flow for given HP! ...

will the Elgin E-1840p cam or will fit my truck ?

So I'm sure this has been asked a bunch of times but I'm not that great with searching these posts. So here is what I have and I appreciate all the...

How do I move a thread from pics vids to here? I'm going to need technical input and suggestions in this super budget build beast lol....

I'm done a search through here and all the posts are really old so going to ask again for 2019. I have a 4l80 e that I have swapped onto my 4.8 in a...

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...

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...

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.