HF Exhaust Muffler 50 series with a 4" inlet and center/center configuration provides improved exhaust flow, a deep tone, and reduced interior resonance for larger vehicles

HF Exhaust Muffler 50 series with a 3.5" center/center configuration offers improved exhaust flow, a deep tone, and reduced interior resonance, ideal for larger vehicles.

HF Exhaust Muffler 50 series with a 3" center/center configuration provides improved exhaust flow, a deep tone, and reduced interior resonance, perfect for large vehicles.

HF Exhaust Muffler 60 series with a 4" center/center configuration offers improved exhaust flow, a mellow tone, and enhanced throttle response for larger vehicles

HF Exhaust Muffler 60 series with a 3.5" center/center configuration offers enhanced exhaust flow, a mellow tone, and improved throttle response for larger vehicles.

HF Exhaust Muffler 60 series with a 3" center/center configuration improves exhaust flow, provides a mellow tone, and enhances throttle response for large vehicles.

HF Exhaust Muffler 50 series with a 4" center/center configuration improves exhaust flow, offers a mellow tone, and enhances throttle response for larger vehicles.

HF Exhaust Muffler 50 Series with a 3.5" center/center configuration enhances exhaust flow, offers a mellow tone, and improves throttle response for larger vehicles.

HF Exhaust Muffler 50 Series Delta Flow Muffler, 3" center/center, offers moderate performance sound with reduced interior resonance for street and truck applications. 

HF Exhaust Muffler 50 Series Heavy Duty, 3.5" center/center, delivers a deep, moderate tone with durable construction for high-output truck and performance use.

HF Exhaust Muffler 50 Series Heavy Duty, 3" center/center, provides a deep, moderate tone with robust build for trucks and high-performance applications.

HF Exhaust Muffler 40 Series Delta Flow, 3" center/center, delivers an aggressive tone with improved flow and reduced resonance for street and performance vehicles.

A 3.5" Vacuum Exhaust Cutout (open style) opens under vacuum pressure for a louder exhaust note and improved performance, remaining closed at idle.

A 3.5" Vacuum Exhaust Cutout (closed style) stays closed under vacuum for quieter operation and opens when vacuum pressure is released for increased exhaust flow.

A 3" Vacuum Exhaust Cutout (open style) opens under vacuum pressure for a louder exhaust note and improved performance, remaining closed at idle.

A 3" Vacuum Exhaust Cutout (closed style) remains closed under vacuum for quieter operation and opens when vacuum pressure is released for enhanced exhaust flow.

The Vacuum Control Pump Kit is a system designed to regulate vacuum pressure for various automotive applications, ensuring optimal performance and efficiency.