Black Snake

First, whats the stock diameter of the stock H pipe? Is it 2 1/2 inches? Because I got the Mac headers and it doesnt seem to fit over the doughnut ring all the way, and im getting a leak (doesnt really matter since my x pipe is coming in on Tuesday) But if the stock h pipe is 2 1/2 then im thinking my X-Pipe will have similiar problem.

Second, whats the Stock timing for and 87-93 GT (mines an 87)?

Third, Whats the best timing I should run?

black89gt

stock hpipe is 2 1/4

NegadivOne

timing is 10 degrees btdc stock

Black Snake

Would a good timing be 12 Degrees? Will my UPR 2 1/2 X pipe fit properly with my headers?

92hatchLX

Ya, the stock exhaust system is 2.25". Do you have 2.5" tail pipes? If not you're going to have to drill out the holes on the catback flanges to get the new x pipe to fit to the catback. My timing is set at 14 btdc and that's where most people have theirs.

NegadivOne

As long as you run high octane gas

stanglx2002

i have 14 degree timing with 87 gas in the car and it runs great also the 2.5 h pipe will fit the 2.25 catback

Black Snake

I think I have 2.5 tails, but it doesnt matter since Im running dumps. I might go with tails if it sounds like ****. So 14 degree timing is good? How does it sound? Does it somtimes die on you?

Black Snake

Also What light bulbs can I use in the dash to make them brighter?

Black Snake

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