kaudev

Considering installing a set of Thorley tri-y headers (#310Y-49-C) on my 2003 Silverado 2500HD with 6 liter engine. Every thread I've looked at kinda nibbles around the edges on this one without a definitive answer--those with 4.8 or 5.3 liter engines seem to get bogged down on the y-pipe question and altering the plumbing. Heck, I know mating the 6.0 liter's exhaust tubing to headers will require a bit of cutting and refitting--not a big deal. The question is will I run into any frame interference using the 310Ys on a 2500HD frame that the guys with a 5.3 on a 1500 don't experience? Looking for feedback from anyone who has actually made the install or gave up trying if it didn't work.

neilownz

I think the steering shaft would be closer to hitting than the frame. Need to ask people with them how far they go out from the heads etc.

2500HDKartRacer

iTrader: (1)

Steve Bryant fit these headers on a Yukon XL 6.0L. This should be very comparative to the 2500HD with 6.0L.

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The Thorley Tri-Y headers are on my list of mods to be performed.