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Old 03-26-2003, 02:07 PM
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Question Exhaust X pipe configuration

I was looking into putting a new exhaust system in my 75 Jag. Since it has a Chevy 350 I was thinking of dual cats into an X pipe then into 2 Raptor mufflers then into a small set of resonators. My question I've been looking at seveal X pipe setups and have found that the usually the X pipe ends up about the rear seal on the transmission. Do I need to add a heat shield then? Won't the extra heat dry that seal out causing it to fail?

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Mark

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Old 03-26-2003, 02:18 PM
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it might be an idea to get an estimate at a local exhaust shop.I think that you could probably get away with moving the x pipe down from the tranny a bit.
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Old 03-26-2003, 07:26 PM
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I have built several jag to chevy swaps for my self and customers,, I just put a connector between the two pipes just in front of mufflers, that bolts toghter way back from trans and is away from every thing. Are you running your pipes over axel and through sub frame like stock,, If so remember to make it bolt apart like stock or youl never work on rear end ,, brakes etc. use two or three bolt flanges at every spot don't rely on slip joints they are to hard to get apart later
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Old 03-28-2003, 10:08 PM
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Fire Power:
Are you using an H pipe? I bought this car already coverted and am now in the process of doing things the right way. A place called Valentines Vettes here in Ca. did the convertion. While it looks ok maintance on the engine compartment was a bit lack luster. I'm re-hosing the vacume lines right now. Also what diameter pipe are you using?

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Mark
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Old 03-29-2003, 12:43 PM
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I have checked into the x pipe setups and from everything I hear they are the way to go. The H pipe is better than not having a crossover, but the x pipe setup promotes more of a scavenging effect creating more horsepower. Check this website: drgas.com

They make and sell x pipe configurations for different cars (he drives a Ford so they aim towards Ford products). They sell these pipe setups to IROC and NASCAR teams, and 2002's winner of the Daytona 500 was running one of the Dr. Gas x pipe setups.
They claim it adds up to 10% more horsepower! Now thats quite a claim, but I researched it quite a bit and while that figure sounds a bit high, everyone I talked to says they really make a difference. I was told that by running one of those x pipe setups, even with a good flowing muffler, you will realize more horsepower gain than you will by opening your headers, and you save your eardrums! lol. Check it out for yourself and let me know what you think.
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Old 03-31-2003, 08:09 AM
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Jag daddy sorry for the delay been gone a few days Yes I was talking an H pipe don't see the need for X type unless you totally into racing for time. Stock pipe is 1 3/4 and I have been able to get 2'' over axel but very hard to fit due to space limits, for a street car with normal 350 this should be enough. good luck.
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Old 04-02-2003, 05:16 PM
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Hey Fire power, you have any pictures? I looked under my car and here is what I have:

Rams horn manifilds into a Y pipe single pipe to the cat the a Y pipe out into 2 mufflers then the rear end section into 2 resonators and out to 2 chrome tips.

This just seems a bit constricted to me but what you guys think?

Thanks
Mark
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