Best in 7 days
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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Oct 12 - Oct 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
FMF Racing YFZ450 Factory 4.1 S/O Anodized Titanium MufflerThe Factory 4. 1 RCT incorporates the latest in FMF Resonance Chamber Technology both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering moving the muffler closer to the motor to centralize mass. The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
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Best in 7 days
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Best in 7 days
4.1 ★★★★★
Based on 2210 reviews
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Product Reviews
★★★★★ 5
Works as promised
Size: 2-Pack
Great product! Highly recommend. My check engine light turned off quickly, probably less than 20 minutes after I added the bottle to my tank and started driving. I waited a week to write the review just to make sure the check engine light didn’t turn on again. Success!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 1
Don't waste your time
Size: 2-Pack
I did it 2 times back to back didn't do anything. Failed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 4
Don't buy if your cat is plugged
Size: 2-Pack
The product works just not for long I followed the directions even added 2 it worked good until I filled up the vehicle with fuel
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Great Product
Size: 2-Pack
Great product, worked wonders!! I would definitely recommend to others to buy this product!!
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Reviewed in the United States on April 5, 2026
★★★★★ 1
Disappointed
Size: Single
It didn’t work as expected
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Reviewed in the United States on May 30, 2026
