Thermal R&D Ceramic Coated Dual Rear Exit Touring Exhaust System for the Polaris Slingshot (2015-19)

(40 reviews) Pre-Order
  • $1399.00
    $1199.00 Discounted Price
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  • Part Name: thermal-dual-rear-exit-touring-exhaust-slingshot
  • Part Number: SM-4167

Available Options

Thermal R&D

Mfg. Part #:

Pipe Diameter:
2" Mandrel Bent

Black Ceramic Coated

Hardware Included:

Made In:

T304 Stainless Steel

Lifetime Warranty

Slingshot Application Guide:

» 2015 Slingshot Base / SL / SL LE
» 2016 Slingshot Base / SL / SL LE
» 2017 Slingshot Base / SL / SL LE / SLR
» 2018 Slingshot GT LE / S / SL / SLR / SLR LE
» 2019 Slingshot GT / S / SL / SLR

Polaris Slingshot Ceramic Coated Dual Rear Exit Exhaust System by Thermal R&D
Every once in a great while a product is released for the Polaris Slingshot that absolutely blows our minds. This dual rear exit touring exhaust system from Thermal Research & Development is one of them! This is the first exhaust system for the Polaris Slingshot that checks all the boxes. It's ceramic coated from top to bottom, which insulates the exhaust heat, vastly reducing cabin foot well and trans tunnel temperatures, making it the most comfortable rear exit exhaust system we've tested to date. The entire system is built from 304 mandrel bent stainless steel and tucks in the trans tunnel so that you don't lose ground clearance. The exhaust system features custom billet aluminum exhaust hangars for the rear end and a trans tunnel mount with polyurethane bushings for the center support along with a center slip joint to allow for vast temperature variations. Most importantly, the tips run low to the ground and shoot out of both the left and right corners of the vehicle, making this the first dual exit exhaust system that is compatible with all of our rear fenders and luggage systems. It's also the first rear exit exhaust system that had zero emissions smell in the cabin. If you're looking for the creme de la creme of exhaust systems, with a perfectly balanced "drone free" exhaust note throughout the RPM band, that's backed with a Lifetime Warranty... Thermal R&D is the choice for you!

Features of the Thermal R&D Touring Exhaust System for the Polaris Slingshot

  • Ceramic Coated from Start to Finish
  • No Droning
  • Mandrel Bent 304 Stainless Steel
  • Compatible with All Rear Fenders & Luggage Bags
  • No Emissions Smell in the Cabin
  • Custom Billet Aluminum Exhaust Hangars
  • Lifetime Warranty


Pipe Diameter 2" Mandrel Bent
Product Details
Color Black Ceramic Coated
Hardware Included Yes
Made In U.S.A.
Material T304 Stainless Steel
Warranty Lifetime Warranty

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Total Reviews: 40
Average Rating: 4.88

04/28/2020 4:27 pm

the sound you want to hear.
i tried a side exhaust system, but i'm not 24 anymore. sounded great but way to loud for me. this system went on sale for $999 and i jumped on it. the tone is deep and mellow. you can carry on a conversation at normal volume, the sound (awesome) is behind you where it belongs. put your foot into it and it just gets better. no drone, a nicely tuned exhaust system that REALLY should be a factory option. if not a standard unit. i did install the 1320 header but kept the stock cat. the installation was done on jack stands and went well. the installation video helped and the system sounds better in person. if your on the fence with this system because of the cost, it's worth the money. ordered and received it within a week.

04/28/2020 2:49 pm

like it
I had the local dealership install mine, they did it in two hours so the cost was well worth having it for me. I like the exhaust but there are a couple issues to consider with it and most important is if you have a tall windshield and roof exhaust will enter the cabin from the rear and this is an issue not commented on in any of the reviews I seen, a rear wind deflector solved this issue, next it is much louder than oem despite what the comments are be prepared, I almost need earplugs. with that said the faster driven or higher rpms it is not as loud, yes I said that correct! clearance is not an issue for me. one thing I may do is try to find a high flow cat, since I removed the oem for better airflow the fumes can be a little strong but still not a big deal with the rear deflector, overall very happy with it and no droning but again much louder when stepping on the throttle.

SlingMods Response:
Hello Pooldude, thanks for the review. I thought worth mentioning that both of the issues you mentioned in regards to the vortex of fumes coming back into the cabin and the louder than expected sound is because you removed the factory cat. This system was designed and tuned for use with the OE cat. If you put that OE cat back in the fumes are not an issue and the purr of the exhaust will be a nice mellow growl. Thanks!

10/12/2019 7:54 pm

Exhaust systems
Exhaust system took care of the heat issue, took about 2 hours to install but worth every penny. Well designed system and sounds great.

10/11/2019 11:48 am

Thermal R&D Exhaust
Easy install and the sound is exactly as described and anticipated. Thanks to Chris for the assistance with the product info.

10/11/2019 5:33 am

Hitting the right note
The answer to so many issues with the factory exhaust. Reduced the passengers footwell temperature as promised and sounds fantastic. Install was not as easy as the video makes it look took about twice as long. Main issue is the springs on the muffler. Have to stretch them a bunch. I do it again. Well worth it time to install. Communications from SlingMods is not the greatest. Was told that product was to ship end of month and had to call the middle of the next month. Not good. I understand manufacturing delays but how hard is it to send out an email updating the customer on the status of their order.

SlingMods Response:
Hello Sir, thank you for the review. We actually do have a system in place to send automatic email updates when an item is either on backorder or the MFG lead time is extended. These email updates only occur when the item(s) are shipped from our facility. Since we dropship this item directly from Thermal.. the system did not trigger automatic e-mail updates. Thanks for pointing out the flaw of the pre-order / back order email update system. I'll have my team get on a fix for dropship trigger point emails.

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