Description
VEHICLE FITMENT
2014-2021 Jeep Grand Cherokee 5.7L V8
Summit Edition
*For Non-Summit Edition or similar see Part # 14991
**Will Not Fit Vehicles With Factory Equipped Rear Tow Hook
PRODUCT DESCRIPTION
2.5″ Cat-Back, Dual Rear Exit with Twin 4.0″ Polished Pro-Series Tips
Xtreme Sound Level
Part # 21188
*For best driving results turn off “ECO” mode or Tune out 4 cylinder “ECO” mode.
Sport Sound Level
Part # 14992
![]() ![]() |
![]() ![]() |
|
|---|---|---|
| Sound Level | 📹 Xtreme | 📹 Sport |
| Pipe Dia. | 2.5″ | 2.5″ |
| Exit Style | Dual Rear | Dual Rear |
| Tip Style | Twin 4.0″ | Twin 4.0″ |
| Tip Cut | Slash Cut | Slash Cut |
| HP | +8 | +8 |
| Lbs ft TQ | +12 | +12 |
| RSC® | ✓ | ✓ |
| Flow Increase | 63% | 63% |
| Decibels (dB) over Stock | +20 under acceleration |
+12 under acceleration |
| Weight Savings | -18 LBS | -7 LBS |
|
Polished Black |
21188 21188BLK |
14992 14992BLK |
INSTALLATION & INFO
🗒️ Installation Instructions
*For best driving results with the Xtreme sound level turn off “ECO” mode or Tune out 4 cylinder “ECO” mode.
YEARS: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Explore more from our collection.





![[Open Box]Xtreme / 3.0 In Front Pipe-Back Tri Straight Tips | 2017-2021 Honda Civic Type-R Fk8 (21303) 1](https://axlemotion.shop/wp-content/uploads/2026/05/open-boxxtreme-3-0-in-front-pipe-back-tri-straight-tips-2017-2021-honda-civic-type-r-fk8-21303-1-01.webp)
![[Open Box] Xtreme, Sport / 2.75 In Cat-Back 4.5 In Single Tips | 2015-2017 Mustang Gt 5.0L V8 Convertible (14342, 14341) 1](https://axlemotion.shop/wp-content/uploads/2026/05/open-box-xtreme-sport-2-75-in-cat-back-4-5-in-single-tips-2015-2017-mustang-gt-5-0l-v8-convertible-14342-14341-1.webp)
Reviews
There are no reviews yet.