FMF Quiet Core Insert - 4.1 RCT 040689
Part Number: 18611666
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Description
If you're running FMF's 4.1 RCT exhaust system but need to dial in the noise levels for track regulations or street legality, the Quiet Core Insert is your direct solution. This replacement core reduces sound output without sacrificing the scavenging characteristics and flow dynamics you've tuned for. Swap it in when you need compliance without compromise.
- FMF 4.1 RCT compatible
- Direct-fit replacement core
- Reduces exhaust noise
- Maintains scavenging performance
- Bolt-on installation
- MPN: 040689
- OEM-quality construction
- Reversible with standard core
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