Porter’s “Shorty Offset” Mufflers
Body Length- 14" Overall Length- 20"
The offset Porter Muffler offers two options for your offset needs, 11 degrees, and 17 degrees. The offset Porter Muffler is handmade using heavy-duty 16 gauge aluminized tubing. The stainless steel Porter Muffler is handmade using heavy-duty 16 gauge, highly polished aircraft grade, 304 stainless tubing. Our uniquely designed interior chamber is fitted with a gapped steel spiral core and packed with stainless steel wool to channel the exhaust and make that distinctive Porter Muffler sound. 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.
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.
Picking The Correct Offset Mufflers– If you are currently using a flat, oval-style turbo muffler and cannot change the existing pipe routing to accommodate, the "Shorty Offset" muffler is the solution to this problem! Determine if you are in need of an 11 Degree or 17 Degree Offset Porter Muffler using the diagram below to help ensure the proper fitment.
|
Finish/Color
|
Offset Degree
|
Internal Diameter of Inlet
|
Outside
Body Diameter |
Restriction Size/ Internal Diameter of Body Core |
Part Number |
| Ceramic-Painted Blue | 11 | 2.00 | 3.5 |
1.375 |
PM352001411 |
| Stainless steel | 11 | 2.00 | 3.5 |
1.375 |
SSPM352001411 |
| Ceramic-Painted Blue | 17 | 2.00 | 3.5 |
1.375 |
PM352001417 |
| Stainless steel | 17 | 2.00 | 3.5 | 1.375 | SSPM352001417 |
| Ceramic-Painted Blue | 11 | 2.25 | 4.0 | 2.00 | PM402251411 |
| Stainless Steel | 11 | 2.25 | 4.0 | 2.00 | SSPM402251411 |
| Ceramic-Painted Blue | 17 | 2.25 | 4.0 | 2.00 | PM402251417 |
| Stainless Steel | 17 | 2.25 | 4.0 | 2.00 | SSPM402251417 |
| Ceramic-Painted Blue | 11 | 2.50 | 4.0 | 2.00 | PM402501411 |
| Stainless Steel | 11 | 2.50 | 4.0 | 2.00 | SSPM402501411 |
| Ceramic-Painted Blue | 17 | 2.50 | 4.0 | 2.00 | PM402501417 |
| Stainless-Steel | 17 | 2.50 | 4.0 | 2.00 | SSPM402501417 |
| Ceramic-Painted Blue | 11 | 3.00 | 4.0 | 2.00 | PM403001411 |
| Stainless-Steel | 11 | 3.00 | 4.0 | 2.00 | SSPM403001411 |
| Ceramic-Painted Blue | 17 | 3.00 | 4.0 | 2.00 | PM403001417 |
| Stainless-Steel | 17 | 3.00 | 4.0 | 2.00 | SSPM403001417 |
Customer Reviews
I have a 1996 Buick Roadmaster Hearse built by Eureka Coach. It has the 5.7 LT1 SBC. I wanted a mellow idle and a deep classic sound under throttle. These muffler did exactly that. The sound is perfection. Quality seems to be 100%, delivery was damn near immediate. Would not hesitate to recommend Porter Exhaust or to order from them again. Great company.
Thak you William for leaving this 5 star review! We are happy to hear of your satisfaction.
The mufflers sound good (at least from what little I have run them) however I am disappointed in the fitment. The ID of the muffler is much larger than 2.5” as advertised. This is makes the muffler difficult to deal with band clamps. I would have expected a tighter fit. I ran this muffler next to a flowmaster flowfx muffler and I like the sound of the porter but for the cost I would expect the tolerances to be better. I do not believe this is in error as I have two and they are both too big.
Thank you for your review Weston, please give us a call so we can get this taken care of!
I put these on a big block 396 and they are perfect. No drone cruising. I didn’t want a quiet muffler either. These let you hear the power when you want. Very awesome sound when you get on it. Couldn’t be happier.
One thing to note, you need videos of big blocks with shortys on.
Thanks for the review mike! We will share this photo you sent on social channels!!
Sounds awesome not to load good rumble
Thank you for the review!
Perfect mufflers!
Thank you!
