PLM Power Driven H-Series Hood Exit Race Header 4-1 Megaphone H22 F20B H22APrivate Label Mfg. Power Driven H Series Hood Exit Race Header 4 1 Megaphone PLM Private Label Mfg. Power Driven H Series hood exit race header with 4 1 megaphone collector features a true 4 1 merge collector with a reverse cone outlet to create maximum exhaust flow. Engine Fitment: H Series H Series Swap H2B Swap H22 H22A F20B Vehicle Applications: 1992 2000 Honda Civic 1993 1997 Honda Del Sol 1994 2001 Acura Integra 1988 1991 Honda CRX with H Series