★★★★★ 5
Perfecto
Casa perfecto
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 7, 2025
ISR Performance Universal Exhaust Silencer - 4in
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
ISR Performance Universal Exhaust Silencer - 4inSKU: IS UNIS 4 ISR Performance Universal Exhaust Silencer 4" Legal only for use in competition vehicles which may never be registered, licensed, and or used on public streets or highways, and also for use in other exempted vehicles. Click HERE for the 3" version
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Your ISR Performance Universal Exhaust Silencer - 4in orders ship within 1-2 business days.
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- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 454 reviews
Sort
Product Reviews
★★★★★ 4
Good product
Fits nice. No proplem to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 14, 2023
★★★★★ 5
Fits and looks good
Model: E46-4door, Size: Double Slats-Glossy Black
Fit great, looks good. Would recommend for e46
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Product as described!
Product as described. Nice snug fit for the 325ci!
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Reviewed in the United States on December 8, 2025
★★★★★ 3
Doesn’t fit face lift sedan
Model: E46-4door, Size: Double Slats-Glossy Black
Did not fit 2004 330i sedan is a face lift looks nice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
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