Porter's Standard Length Muffler
Body Length- 20" Overall Length- 26"
All Porter Mufflers are non-directional, allowing them to be mounted in either direction. Exhaust gas passes through the center of the steel spiral core with the sound dissipating into the stainless-steel packing preventing drone. Unlike glass-packed mufflers, our steel-packed mufflers will never break down.
Our mufflers are designed to create a slip fit lap joint with your mating exhaust tubing. We suggest welding this joint instead of using band clamps as it will perform better over the length of the muffler and create an air tight seal.
Created back in 1931, our first ever product, that has set the standard for the future of our company. To continue our tradition of quality each Porter Muffler is handmade using only the best heavy gauge and high quality steel products sourced in the U.S.A.
| Finish/Color | Straight |
Internal
Diameter of Inlet
|
Outside
Body Diameter |
Restriction Size/ Internal Diameter of Body Core |
Part Number |
| Ceramic-Painted Blue | ✓ | 1.75 | 3.5 |
1.375 |
PM35175 |
| Stainless Steel | ✓ | 1.75 | 3.5 | 1.375 | SSPM35175 |
| Ceramic-Painted Blue | ✓ | 2.00 | 3.5 | 1.375 | PM35200 |
| Stainless Steel | ✓ | 2.00 | 3.5 | 1.375 | SSPM35200 |
| Ceramic-Painted Blue | ✓ | 2.25 | 4.0 | 2.00 | PM40225 |
| Stainless Steel | ✓ | 2.25 | 4.0 | 2.00 | SSPM40225 |
| Ceramic-Painted Blue | ✓ | 2.50 | 4.0 | 2.00 | PM40250 |
| Stainless Steel | ✓ | 2.5 | 4.0 | 2.00 | SSPM40250 |
| Ceramic-Painted Blue | ✓ | 3.0 | 4.0 | 2.00 | PM40300 |
| Stainless Steel | ✓ | 3.0 | 4.0 | 2.00 | SSPM40300 |
Awesome! Quality made product with a great sound. Fast shipping.
Fit was spot on and tube size was what I needed definitely need to buy more for my two other trucks.
Thank you for taking the time to leave a review, David!
Shits g2g. Built stout like a German women. Sounds good too.
Thanks for the review!
I put a pair of 3" Porter mufflers on my Plymouth Fury with a built 440 and it sounds spectacular! I've had a lot of compliments on how good it sounds. I've got a short exhaust so it's a nice rumble at idle, and at wide open it screams! I couldn't be more happier! Great customer service too!
Thank you for taking the time to leave a nice review!! :)
I installed two 20" x 2" Porter Mufflers on my 1955 GMC 1 ton, engine I6 261 with Fenton headers, true duals, and have 7' of 2" straight pipe from both of the mufflers. These porter mufflers with this setup, makes best sound ever!
Note: I have another old GMC I and working on, and will be doing the same.
Thanks for the review Jonathan!
