Empi 3739 Replacement 4" Spark Arrestor Discs.

Specs:
Steel
Disc Diameter 4"

Spark Arrestor Discs Are Stackable Allowing Fine Tuning On Your Exhaust Flow For Maximum Horse Power And Torque. Removing Disc Will Increase Back Pressure, Adding Disc Will Reduce Back Pressure And Increase Flow And Noise.

Sold As Set Of 6