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TTI X-Pipes: Better Breathing Exhaust

BY RICHARD EHRENBERG. Copyright © 2005 Richard Ehrenberg. Reprinted by permission.
First printed in Mopar Action

When we began setting up the Bold 'Beeper, one of the items we'd be using was a no-brainer: the
awesome TTI headers and fat 3-inch duals.
Just as we were screwing the H-pipe setup
into place (way back in the October, 2004
issue), TTI was announcing their new
NASCAR-style X-pipe design.

Monochrome photography Monochrome Black-and-white History Pipe

Due to an especially clever design, the headers,
mufflers, and tailpipes need not change. In
fact, even after seeing a moderate amount
of road salt last winter, the existing, heavily aluminized H-pipe
setup came right apart - so easily, in fact,
that with a few whacks of a rubber mallet, we were able to drop the H off of the
collectors, and slip the pipes forward out of
the mufflers. This little installation shortcut
probably cut the wrench time in half.

Once installed, not much was
obvious change at first, except for an exhaust
tone a tad mellower and less raspy. The car
did, however, feel more responsive and
quicker overall, so a trip to the chassis dyno was in order.

Black-and-white Monochrome Metal Monochrome photography Household hardware

Once we looked at an average of a few runs, there was no question remaining in our
minds. The X-pipe works, big time!

While some unknown percentage of our gains probably came from the Comp Cams highflow air cleaner, and having a few more
miles on the engine, Barton's generous
clearances mean that an extended break-in
isn't meaningful. And, we were up 24 RWHP
(!) to 459, and gained 16 foot-pounds on the
torque number - using the very same headers, collectors, mufflers, etc., and with several additional bends. Pretty amazing stuff.

This just points up what a
black art exhaust design is: At a glance,
you'd think that all the extra bends in the Xpipe
system would cause more restriction than the seemingly free-flowing H setup. Obviously, looks can be, and are, deceiving.

Source: Tube Technologies, Inc. (TTI), 1555
Consurer Circle, Corona, CA 92880; (951)

For more by Rick Ehrenberg, click here!

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