Catalog › Installation Guide: Pontiac G8 Axle Back Installation Guide: Pontiac G8 Axle Back

Removing the Stock Mufflers

1. Unbolt the muffler assembly at the rear flange connection using a 15mm socket.

2. Pull down on the muffler assembly and squirt soapy water into the rear rubber hangers where the metal rods go thru it. You could use penetrating oil but it deteriorates the rubber. Doing this makes it easier to slide the mufflers out of these hangers.

3. By either pulling the mufflers or prying with a large flat screw driver or pry bar, manipulate both mufflers out of the stock rubber hangers.

4. The stock muffler is now disassembled and its time to put your new axle back exhausts kit on.

Installing Your New Exhaust Kit

1. Slide each axle back piece into the rear rubber hangers.

2. Align the flange connection and install SOLO’s gasket, nuts and bolts. Be careful handling the gaskets as the edges are sharp.

3. Finger tighten both sides and manipulate the exhaust tips into position.

4. At this point it’s nice to have another set of hands and a good eye to hold the tips perfect position.

5. While holding the tip in position, snug the flange connection evenly.

6. While holding the tip in position, tighten the flange connection evenly.

7. A small gap may appear between the flanges. This is OK. The gasket has an inner “fire ring” and as it crushes, it forms a perfect seal but doesn’t crush all the way flat. This extra material on the “fire ring” causes the small gap.

8. The J-pipes only come snug FROM Solo and can be swiveled to fit your car. Swivel the j-pipes into position then tighten all four (4) band clamps to 50 – 60 foot pounds or until tight.

9. Road test…..

10. The j-pipes are at a “factory preset” that is good for most G8’s. If you hear any bad RPM ranges or vibrations you can shorten or lengthen the top piece of the j-pipe to “tweak” your car to your liking.

11. To shorten or lengthen the j-pipes just loosen the top clamp and shorten or lengthen both sides.

12. The procedure that we use is:
•  Shorten by 1”
•  If this makes the sound more desirable move in either direction ½” until fully satisfied.
•  If shortening the j-pipe makes it worse, then length if from this position by 2”.
•  Move in ½” increments from here until fully satisfied.

13. Drive away and… Enjoy Going Solo!