Tri Y Thorley headers. [ I know not a true long header ]
welded flanges on the cat bolted to collectors.
Cut up the stock Y moved it back about 1 inch.
Tri Y Thorley headers. [ I know not a true long header ]
welded flanges on the cat bolted to collectors.
Cut up the stock Y moved it back about 1 inch.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
Where did you get your Tri Y's, I wanted to look into a set of these. I heard you can get a lot more bottom end out of these over true long tubes. I'd rather have a lot of bottom end since i tow all the time.Originally Posted by metalchips
05 Crew Cab....just starting the mods!
5.3 w/ Airraid intake tube, stock box with K&N, MBRP 3.5" cat back, Dynatech Longtubes, wait4me tune....to come...4.10's, custom Dyno Tune, maybe a few other goodies.
Got them from
Summit Industries, Inc [not Summitracing]
ph# 951-739-5900
Part #
THY-310Y-49-C
year 99-01 no smog fittings
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
Im running Pacesetter Long Tubes on mine. Plenty of clearance. I did not get the y pipe I had mine custom fabricated.
DANIEL CAMMED SS 13.46 @ 98.17-- 8.58 @ 80.31
2003 Silverado SS / LQ9 6.0L / Wheatley 93 Octane Tune / 224/228 .581 .588 110lsa / Patriot Gold Dual Springs / Comp Hardened Push Rods / Circle D 3800 stall / Pacesetter LT's / 4:10 Gears / Transgo HD-2 Shift Kit / K & N Cold Air Intake / Corvette Servo / Aeroforce Interceptor / Autometer Narrorband(Wideband on the way) / Mobile 1 Synthetic / Single Chamber Flows with X Pipe / Cats Delete with Cutouts
will they fit an 05?
05 Crew Cab....just starting the mods!
5.3 w/ Airraid intake tube, stock box with K&N, MBRP 3.5" cat back, Dynatech Longtubes, wait4me tune....to come...4.10's, custom Dyno Tune, maybe a few other goodies.
give them a call
there is fit then there having them tested and smog approved $$$$$$$$$$$$ to make them legal in U S of R R = Russia
Plant a tree save the world.
Loose your job = good no more smog going to work.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
i'll have to do that..see what they say, what did you notice performance wise from these headers?
i like running as little polution control as possible...my favorite bumper stick is "Buy a Hybrid, I need your gas!" haha
05 Crew Cab....just starting the mods!
5.3 w/ Airraid intake tube, stock box with K&N, MBRP 3.5" cat back, Dynatech Longtubes, wait4me tune....to come...4.10's, custom Dyno Tune, maybe a few other goodies.
I'm going to put a hybrid sticker above or below my 6.7L stickers when I do them.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
I put a Cam in about the same time. With both I dropped a second in the 1/4 mile with my Interceptor gauge.
I am running my cats so I would be emission legal.
I didn't need the air pump fittings.
2002 GMC 1/2 ton Sierra,4WD, Xct cab, camed, mid-length headers, Nelson tune, electric rad. fan, trany cooler, Heavy 5750 lbs with topper.
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