S2000 with J series motor swap. Custom ASP Header is designed in 304 stainless steel, made to not rust. Individually fabricated to match each client's motor specs. Designed with stepped equal length runners, and uses a true 4 into 1 merge collector to insures optimum air flow efficiency and full hp:tq potential. The megaphone/reverse cone is highly beneficial in delivering maximum peak horsepower and power bandwidth. Made in USA.