I put together a $300 header-back exhaust system for my 4.0L 1999 Jeep Cherokee. I used this Dynomax Super Turbo because I wanted to achieve a mild sound that carried a small amount of throat hidden in the background. With this muffler, I can't tell the difference between the factory muffler until I walk behind the vehicle, then you hear the slight tone of an old gasoline pickup truck. It's muted, but there is a little bit of throat to it. It is exactly what I was looking for. The interior noise is so low, that it is not worthy of mentioning. No interior drone.
If you are putting together a system, the first thing I would recommend to you is the Bosal downpipe from Autozone. I was most impressed with the build quality of this part over any other part I used. It has a better appearance than the Walker down pipe. It doesn't have all of the crinkle bends that the Walker has.
The next recommendation I would give to you is the Nickson band clamps that I bought at O'Reilly Auto Parts. Band clamps usually run about $10-$15 each. At O'Reilly they were $5-$6 each. Band clamps are nice because they hold the exhaust system together without deforming the exhaust pipe as badly as the typical U shaped (guillotine) clamps do. This helps you in the event that you might need to dismantle your exhaust system to remove your transmission in the future.
The most notable part that I purchased was the tailpipe. There wasn't anything particularly special about the pipe itself, other than the fact that it was only $17.55, and ***most importantly***, I used a (Walker 45944) tailpipe that was for a 1986-1992 jeep XJ Cherokee. It was a typical Walker part, so it had crinkle bends all over it. The thing I liked about it was that it had the normal exhaust hanger that every Cherokee uses behind the muffler, but it didn't have the horizontal bar hanging off of it towards the rear-end of the vehicle. My jeep uses the hoop-strap style exhaust hanger. I did not need the bar to mount mine, but the walker tailpipe for my 1999 xj had a dumb little bar welded to it that I would have to cut off. Additionally, I knew that I was going to be cutting it flush with my leaf spring in the rear and putting a turndown on it (see picture), so I didn't want any interference from the unused hanger that was welded on.
Other than that, i was impressed by how easy it was to cut the exhaust pipe with the exhaust pipe cutting tool (rented from autozone). I used an exhaust pipe expander (rented from autozone) to fit a few of the parts together since they were not perfectly round when they arrived.
I had oxygen sensors from NKG sitting on a shelf for the past few years that I had been planning on installing once I got a new exhaust system. They were about $22 each from Rock Auto. The price of those aren't included in the $300 dollars I paid for the exhaust system. Most systems only come with the pipes though, and for $300 I got the band clamps, exhaust hanger, insulator, gasket and all of the pipes.
Here is a breakdown of the parts and prices.
O'Reilly auto parts:
1 Exhaust Clamp 1.25" (Nickson)
1 Band clamp 2.50"(Nickson)
3 Band Clamps 2.25" (Nickson)
1 Gasket (Nickson)
1 Insulator (Nickson)
1 Rear Hanger (Walker)
1 Turndown Exhaust Tip (Nickson)
$49.42
Autozone:
1 Down Pipe (Bosal)
1 Exhaust Pipe Cutter (Free Rental)
1 Exhaust Pipe Expander (Free Rental)
57.99
Amazon:
1 Catalytic Converter (Walker) $118.79 + tax
1 Muffler (Dynomax) $57.21 + tax
1 Tailpipe (Walker) $17.55 + tax
Total: $300.96
| Manufacturer | Dynomax |
|---|---|
| Brand | Dynomax |
| Item Weight | 13 pounds |
| Product Dimensions | 27.1 x 10.4 x 4.9 inches |
| Item model number | 17747 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 17747 |
| OEM Part Number | 17747 |
