SP Concepts Big Bore 4.5

  • 4.5” HIGH FLOW PERFORMANCE ROLLED CONE MUFFLER WITH STEPPED BAFFLE FROM 2 ¼ TO 2 ½ INCHES. INCREASES BOTTOM TO MID RANGE TORQUE AND HORSEPOWER ON ALL MOTORS. TUNED PROPERLY CAN ACCOMMODATE 88" TO 143".
  • 065 STAINLESS STEEL HEADERS, STEPPED FROM 1 ¾” TO 1 7/8” TO 2” AT THE COLLECTOR
  • HAND TIG WELDED FROM TOP TO BOTTOM
  • MACHINED STAINLESS STEEL HEADER COLLARS
  • 18MM O2 BUNGS WITH 12MM ADAPTERS, ALLOWS FOR STOCK OR AUTOTUNE SENSORS
  • COMPLETE HARDWARE KIT WITH EVERYTHING YOU NEED TO MOUNT IT UP