<font size="2" face="Verdana, Arial">Huh? The Cat terminates in a horizontal position, just above the bottom of the block. The Race Header terminates underneath the motor in a vertical position. This being the case, and the fact that the Flex Pipe start is on the front of the block, in a horizontal position, how does a Flex Pipe fit in that set up?Originally posted by DESIGNER4MUSTANG:
No, the header will only replace the stock header and cat, you will still want the flex pipe. As that will be the most restrictive part of your exhaust. Have someone weld in the cat into your borla straight pipe, after the flex. Does the Borla have a resonator? If so, replace the resonator with the cat.