Forum: Performance Modifications

Hey everyone. So my 2006 GMC 1500 HD Crew Cab 6.0 rusted through a spot in the factory y-pipe. Truck has a 12" CST lift. Transmission rebuilt with...

I have an 03 LQ4, and would like to put in a set of cheap LQ9 flat tops, but the rods in an 03 LQ4 have press for Pistons, and all the LQ9 pistons...

Hello, I just received a used Chevy 5.3L Vortec engine (LM7) out of a 2003 Silverado. Everything on it is stock at the moment and I would like to...

As far as I know, this has not been done. I will be attempting the swap in the next few days and will keep a nice record of how it's done so others...

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! ...

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 talked to arh today. They told me they didn't have headers for my 2004 2500 Silverado 4x4. They said the headers would fit but the mid pipes...

going to be getting a new motor for the truck the 5.3 is on its way out... heres what im thinking lq4. 317 heads. may have them cleaned up see...

Hey guys, about two months I purchased a 05 Silverado 1500 ext cab 4wd with the dreaded 4.8. Was kind of in a bind and needed a vehicle or I would've...

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 I am in the middle of doing a 6.0 lq4 swap into my 95 k1500 and am looking to do a cam while I have the motor out. It'll be a first as far as...

Hi Guys I have a tech ? I purchased a TCI flex-plate for my truck after i found out that my stock one is cracked. here is a few details on my...

I have a 2013 Sierra with a 4.8L. I have long tube headers ypipe back exhaust as well cold are intake and a tune right now but I want more power I...

Well I made it to the track last fall with my 6.0 obs rcsb truck ran good went 12.30 at 110 current set up is a stock lq4 with shaved .030 243 heads...

Hey everyone. I wasn't sure if this should go in the performance or conversion swap section so if this isn't where it belongs feel free to move it. ...

I keep hearing rumors that the spindle from a NBS (6-lug) can be swapped into an OBS to facilitate bigger brakes on an OBS. Cant seem to run them to...

Hey guys, just picked up a 2010 Sierra with the all aluminum flex fuel 5.3. I'm looking at doing the DOD delete and a cam with supporting mods. My...

Was thinking of using a 90mm (actually 88mm) throttle body off a newer 6.0 & 6.2 truck engine with the 4 bolt pattern but my stock intake is for the...