STM Evo 7/8/9 Stainless Steel Cat-Back Exhaust

STM Tuned Inc.



We price match!

The STM stainless steel cat back exhaust for Evo 7, Evo 8 and Evo 9 bolts directly to your factory cat or test pipe and saves 14 pounds! Features full 3" mandrel-bent piping and tig-welded flanges with an Ultra-Quiet muffler for the perfect mix of street-ability and performance.

All new mounting hardware is included along with three Remflex graphite gaskets for a leak-free install. We offer two different rear section designs to perfectly match your JDM or USDM rear bumper for a flawless look and fit!

Vehicle Fitment:
2001-2006 Evolution VII VIII IX
• Select bumper fitment in the purchase menu

Specs & Weights:
• Weighs 21.5 Pounds (Including Hardware)
• Factory Cat-Back Weighs 35.8 Pounds
• Save 14.3 Pounds!
• Hand Fabricated
• Tig-Welded
• Back-Purged
• Full Stainless Steel
• 3" with 2-Bolt Exhaust Flanges
• CNC Flanges
• O2 Bung
• Gaskets and Hardware Included
• Bolts to Factory Cat or 3" 2-Bolt Test Pipe

Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.

Purchase Includes:
(1) STM Three Piece Exhaust
(3) 3" 2-Bolt Remflex Gaskets
(6) M10 x 35 Bolts
(6) M10 Nuts
(6) M10 Flat Washers

Shipping Times: 1-14 Days
Hand crafted and welded in New York, please give our fabricators time to assemble your piece!

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Customer Reviews

Based on 13 reviews
Oj (Margate, FL, US)
Excellent cat back!

Tamed at idle and aggressive on throttle without being obnoxious. Sport but still OEM appearance. No exhaust leaks with gaskets provided. Even threw in a shirt! Good job guys 👏🏼

Rust bucket

Very nice. Perfect fit and fast shipping. Thanks STM.

Tim Fritz (Nazareth, PA, US)
Great looking, sounding and fitting!

Wow, wish I'd have replaced my Tomei sooner! This looks so much more mature, the attention to detail where tip angle/placement is concerned is spot on! This exhaust bolted up with zero issues and it sounds amazing! It is surprisingly much more mellow and subdued when you need it to be compared to the Tomei, all with a single small Vibrant muffler. 10/10.

Alex (Quincy, MA, US)
Sounds good

Compared to my old exhaust it was much quieter even with GSC 3 Cams. I also added a vibrant resonator on, which is perfect for daily driving.

Hugo Brisebois (Shawinigan, QC, CA)
Very nice

Nice quality products and quick delivery.

Cancer and Reproductive Harm