Doug Thorley's

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08-29-2007, 11:48 PM

hawaiianstyle

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Doug Thorley's

Ok I talked to Nick at Thorley's and he said that since I have a classic GMC their 310Y-49 LT Tri-y headers will fit on my 6.0. But I have to cut back my cats. My question is, will Dynatech's y pipe connect to these headers?

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08-29-2007, 11:49 PM

RandomHero

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no thorley's are a midlength header.....just have an exhaust shop make you one

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08-25-2009, 03:00 AM

Hurley00

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Have the muffler shop make you a y-pipe. Mine cost about 75 bucks at the local shop here.

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08-25-2009, 07:22 AM

bad2006z71

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I dont think you have a Y pipe. At least i dont on my 06 vortec max

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08-25-2009, 08:55 AM

Gordy M

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The Thorley Headers should come with 2 adapter for your cats. At least when I bought them 5 years ago it was included. You cut your exhaust pipe just in front of the cats, weld on the connector and then bolt it to the header. Remember, measure twice--cut once.