New C4 Exhaust System - More Bark With Your Bite, Part 2 - Tech

Supplied with our Random Technologies converter is a machined plug to block off whichever A.I.R. input tube will not be used. It's precisely made and fits snugly with a few taps of a hammer. an elbow is also supplied, along with the previously mentioned high-temp hose, to facilitate installation.installation.

The original front Y-pipe ran straight down the middle of the tunnel. Our new headers and Y-pipe are slightly offset to the left, so we added a few washers at the bracket mounting point to align the bracket to the pipe.

You'll recall that when we started this job, we had marked the frame of the car to identify the rearmost point of the catalytic converter outlet pipe. Since we were working with parts from multiple suppliers, we wanted to ensure a proper fit; we found that we needed to trim about a half-inch off the front Y-pipe to achieve alignment with our mark.

This is the original design metal support strap as used with the original mufflers. We removed these from both sides since our new Corsa mufflers are already fitted with "tongues" that slide through the mounts in place of these brackets.

The 90-degree elbow supplied with the new converter allowed for a simple connection using the high-temp hose that was also supplied.

This view from below shows how we spliced in a piece of the high-temp hose from Mid America Motorworks in order to allow us to properly position the A.I.R tube.

With the rear Y-pipe in position, we could now install the extension pipes that go back to the new Corsa mufflers. Note the gorgeous finish on these pipes, courtesy of Classic Coatings.

This is the tool we had to make in order to tighten the front and rear spark plugs on the passenger side. The header tube passes so close to these plugs that you can't fit a deep-well socket over the plug, and the plug is recessed so far into the head that you can't fit a box or open-end wrench on it either.

We really like the band-type clamps from Stainless Works. They're beefy, tighten superbly, and secure well. We especially like the fact that they don't crimp the pipes, which can make for a very difficult disassembly down the road.