EDGE EZX + Insight CTS3 Kit 12713 3 hooker headers Clamp Type Band Clamp Tip 49449 FBHB Clamp Type Band Clamp Tip Length 12 Inlet Connection Type Bolt On Muffler Quantity 3 Muffler Body Material Stainless Steel Valve Included No Type Cat Back Mounting Bracket Included No Title Street Series Hangers Included Yes Tip Type Welded On 59mm DI 59 mm grooved pulley for use with all Holley passenger side LS accessory drive brackets (this pulley is required for LS bracket application using the "standard" belt spacing AND using a stock LS3 LS7 throttle body Insight CTS3 offers you the visibility to always know what going on under the hood the EZX can be adjusted while driving