Yoshimura R&D of America, Inc.

TF450 2025-26 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler

TF450 2025-26 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler - Main image
$662.78 $1069 In stock

Category: Signature Series Exhaust System

The Triumph TF450 (C, E, & X) is here and Yoshimura has our RS-12 Signature Series Full System ready to tackle the job of enhancing performance on this new 450 MX machine.

We enlisted a 304 stainless steel/aluminum/carbon fiber version of our RS-12 to provide more horsepower and torque to the TF450 and man did it deliver!

Our RS-12 delivers a whopping 11.3% increase in horsepower @5000 rpm and a staggering 10.8% increase in torque @5000 rpm. Just where this new 450 wants more! Creating power - here at Yoshimura it's what we do.

The RS-12 is designed, developed and manufactured in Chino California.

Sound levels:
(Using 2 Meter Max/J2825 standards with supplied INS-30-K insert)

2000 rpm (J2825)
Stock: 85.0dB
RS-12 full system: 87.5dB

5000 rpm (J2825)
Stock: 93.9dB
RS-12 full system: 97.7dB

REV: (2 Meter Max)
Stock: 112.0dB
RS-12 full system: 113.4dB

Sound Insert/Spark Arrester Options


Sound Level

Volume Insert Spark Arrestor Included
INS-30-K Yes
INS-32-K No

INS-33-K

SA-21-K No 
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Ella ★★★★★

The RS-12’s 304 stainless construction feels premium through the mid-range, and the aluminum muffler shed noticeable weight off the rear. My TF450E pulls harder off the bottom now, and the sound is a deep bark without being obnoxious. Install took a bit of patience with the springs, but the end resu

Grace Y. ★★★★★

Bolt-on fit was flawless on my TF450X, the RS-12 welds are clean and the muffler tip looks sharp. It dropped noticeable weight up high, and the aluminum canister doesn’t radiate heat like the stock one did. Sound is deeper but not obnoxious, exactly what I wanted for race day.

Ryan R. ★★★★★

The 304 stainless construction feels bombproof, and the aluminum muffler sheds noticeable weight off the rear. Took about an hour to swap, and the mid-range pull on the TF450 E is noticeably sharper without being obnoxious.