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ISR Performance Universal Exhaust Silencer - 4"

2 Customer Reviews Write a Review

ISR Universal Exhaust Silencer - 4"


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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.

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  • Fantastic Noise Reduction

    Posted by Joshua Corbin on 15th Apr 2023

    Holy cow! I am surprised by just how much this reduced the noise from the exhaust on my miata. Especially on a turbo setup. It may be a little tricky to get it in by hand, but it makes it easier if you clean out the soot from the inner lip of the exhaust.

  • Strongly recommend

    Posted by Chase on 13th Nov 2017

    Greatly reduced drone. It's a must have