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Discussion Starter #1 (Edited)
does anyone know how much power i will gain or lose in top end or botton end if i change the stock y pipe and put an h pipe in its place? will i need to get a tune also? Thanks.
 

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You can't just swap an H inplace of a Y. You can thou delete the Y and install an H and then keep it duals to a dual in/out muffler and dump it out the sides. This will give you a performance gain and you will not loose bottom end as long as you stick with a 2.25 pipe diamter. Over that you may loose bottom end torque.

P.S. Check out HKYStormFront's exhaust thread for ideas.
 

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I had my stock "y" cut out and replaced with a 26.00 Magnaflow Y and it definitly gained power. 40 bucks to have welded in. Made a big difference.
 

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The best thing you can do for these trucks is change the Y pipe to a more free flowing one.

 
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