I have found a set of 6.0 LQ9 #317 heads, and was wondering if they would fit my 2002 silverado 5.3 and if so would there be a horsepower gain...
I have found a set of 6.0 LQ9 #317 heads, and was wondering if they would fit my 2002 silverado 5.3 and if so would there be a horsepower gain...
06 TrailBlazer SS LS2 4.10's
02 SC StepSide Factory Orange
Full Bolt-On 370 - Little Cam- Victor Jr Intake -Worked 5.3 Heads - 4.56's - Built 60E - Circle D 4000
07 CTS-V CAI, GM Performance Exhaust, Ported TB, Coil Overs
They will fit and they will flow better than the 5.3 heads. I say go for it. Mabye do a little porting before you install them.
No more trucks, but this is what I used to have. 2000 GMC Sierra, 6.0L-LQ4, Built 4L60, LS6 Cam, The Other Guys Headers, 3 inch exhaust and 7 chamber flowmaster, 43lb injectors, Nelson Tuning, Drop - 3/4 McGaughys Spindles, Bell Tech Shackles & Hangers. Best time 13.59 @ 106
If I recall the LQ9 heads are the same as the LS6 heads with larger combustion chambers. They flow to much for a natraly asperated 5.3 and will kill power acrost the rpm range, they will also lower your compression ratio enless you mill them down. They will work great with forced induction though.
http://i10.photobucket.com/albums/a1...dited-copy.jpg
2007 Sierra crew 5.3 4wd, stock for now
2004 Sierra scsb 5.3 - sold
02 Z28 SLP cold air pack, Corsa exh, Center Force dual friction + 23 lb flywheel
66 Chevy C20 (collecting dust)
You are exactly right Nate
2007 Silverado NNBS RCSB__4.8 Liter
True-Flow Drop-In/Stock Air Box(modded)/AirAid MIT, 3" SLP LM1, Shaner Ported 90MM TB, Wheatley Tuned
1999 LS1 Z28__Stone Stock for Now
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