My bad it's the opposite sorry but the rest is true I swearGMstomper said:You obviously know absolutely nothing about science...cooler air is more dense!!! Why do you think we always want our engines sucking in cooler air??
From personal experience I say stay away from MAC exhaust...especially the LT's. Mine will be coming off once I have the spair change.
I would leave the h on you don't need the free flow of an x on a stock car. it's like putting a high rpm manifold on it ( well not so severe). Take a hint of what all the ricers are doing wrong, just because it's loud doesn't make it faster.87PonyBoyGT said:is this true about the h and x pipes? I have an 87 5.0 with an o/r h pipe and bought an x pipe thinking it will give me better performance. My stang is stock except for the exhaust and its my daily driver. if its true what bullet said i wont even bother installing it.
You are exactly right in that comment, but there is such thing as going over board, I run an 2 1/2 off road h in mine as well and 2 chamber flows out to 2 1/4 mandrel bent tails, with 1 5/8 headers. I found that for what I had (near stock) was the best set up I've run. I worked building exhaust for 4 years, so my car has seen more pipe than a **** star, if you go too big you lose volocity, so your exhaust will actually leave the system slower.ninety15.0 said:I'm not sure about that last comment about leaving the stock h pipe on there. My engine is mostly stock, just a few bolt ons. But i first put a 2.5 catted H pipe on there and it made a huge difference. I then put an off road H pipe on there and i got another decent improvement. Anytime you can move the exhaust out faster is a good thing. It is true that you might loose a little bit of low end grunt if you have a bonestock car with a wide open exhaust...but the high rpm HP is well worth it. just my opinion
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