Competition Exhaust System
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• 4WD 1973-91 Blazer, Jimmy, Yukon with Small Block Chevy 265-400 Engine
  
  
  Notes:
• This dual exhaust system was designed to be used with Hooker Competition Headers - 520-2453. If the dual exhaust is being installed with any other headers modifications will be required. Hooker will not assume responsibility for fit or performance.
• All systems come without mufflers. Hooker recommends using the following mufflers with a 2.25" offset inlet/center outlet configuration:
  Aero Chamber - 520-21501
  Maximum Flow - 520-21601
  Competition Turbo - 520-21005

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART