LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 Kooks LT & ORY to GMMG

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Old 05-09-2012, 02:54 PM
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Default LT1 Kooks LT & ORY to GMMG

I think that the ORY was hacked off at the intermediat pipe. My GMMG is coming up short and is only merging into the connection about a quarter inch. Anybody have pics of their Kooks ORY? Does the GMMG intermediate slip into the ORY?
Old 05-09-2012, 03:05 PM
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If you find the cutting to be the case, most autopart stores sell a 3 inch OD to 3 inch OD peice that you can weld to the intermediate pipe and clamp to the car-back.
Old 05-09-2012, 05:48 PM
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the kooks y pipe is stepped down at the catback (the step is about 4 inches) if yours still has it, noones hacked it up
Old 05-10-2012, 09:27 AM
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There is no step down on the Y-pipe. If there is supposed to be a step down and my GMMG has a step down, that seems to be a problem. Trying to find the best solution to my fix. Thought about even buying a new Kooks Catted Y-Pipe or have Madhammer fab me up a new Intermediate pipe for my exhaust only 2" longer than what comes with the exhaust. I found a 3" id to 3" od connector that I may try. Just my entire exhaust from headers to tips is stainless and now I may have this steel coupling.
Old 05-10-2012, 10:43 AM
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just find a 3" long piece of 3" OD stainless and get it tig welded to your y-pipe. Take your intermediate pipe to any exhaust shop and have the inlet expanded to 3" ID. Slip fit, band clamp it together, and you're good to go for under $20
Old 05-10-2012, 02:21 PM
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kooks Y steps down to a 2.75" thats why people cut them off.
Old 05-10-2012, 02:56 PM
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I'm pretty sure my Kooks Y-Pipe slipped inside the GMMG I-Pipe. That's how it should work.
Old 05-10-2012, 03:23 PM
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Thanks for all the help.



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