Seller notes

Exhaust Port Torque Cones Great for use with unbaffled exhaust that require some type of back pressure to run right. Improves power by increasing the exhaust gas velocity. Helps eliminate flat spots Helps to reduce exhaust reversion. Simple installation no permanent modification, jusr install between the head and the head pipe CNC machined steel with precise angles for maximum effect. Approximate dimensions: 1 3/4" at the rim, tapering down to 1 1/2" at the base. HIGHLY RECOMMEND USING THESE ON ...

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