VENTURI PIPE, very strong broad power band, three stages.
 
(1.025 ID 13.00" IL)
 
Note: Header is designed to accept 1/4" allens, so block must be helicoiled, and for clearance reasons the air cleaner should be the 4" style with angled neck. Be sure to read the instructions that come with the pipe as muffler placement is critical to performance.