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stock size down pipe

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Stock DP is a 2 1/4" straight POS that has a 2 bolt flange. Pipe is bolted to another POS cast iron 90* elbow. Only thing it's good for is for restricting hp and car show fanatics.

It's a proven fact that a smooth bend 3" Terry Houston style downpipe can be worth 20-30 hp on a properly tuned '86/'87.
HTH

Patrick
 
Dp

It will be very interesting to see how fast the factory DP will go this year at BG:)
 
When I pulled my stock down pipe off and measured it, the pipe was a combonation of 2.5 inches at some parts and 2.25 a few other places. Clearly a huge restriction on exhaust flow.

Terry Houston down pipes are no longer being made, but every so often one pops up for sale...just have to be really quick about it because they're HOT items.
 
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