Hi flow cats
 

I want to put a high flow cat system on my car, which pipe should I get the X pipe or H pipe. Also what are the price differences and where is the best place to get them. Thanks for any help...

The H pipe will be a little better low end, make a negliable amount more torque, and the X pipe will make a little more hp and flow better up top.

The price will depend greatly on the manufacturer.

BBK's H pipe goes for about $370, and the X pipe for $400.