ERC Downward GSXR & R6 A Class Stainless Exhaust

Designed for and fits the Suzuki 2mm Outlaw, Suzuki A-Class & Yamaha A-class in a 600 micro sprint race car. Includes 4 header tube adapters to adapt the fitment of this exhaust for the larger Yamaha exhaust ports. 

2-1/16" collector to muffler diameter.

This exhaust system is what we run on our house cars because:

• Power and torque are the best there is (based on multiple engines dyoed at our shop)
• Easy to tune
• Reacts extremely well to rapid throttle position changes
• Fits well
• There is no place on the fuel map where we have trouble getting this pipe the proper amount of fuel. This is not something you hear too many people talk about because most tuners don't spend the time to make sure your engine is getting the proper amount of fuel at ALL RPMs and throttle positions.
• Full Stainless exhau