i had the pacesetter 4-1 header and blitz nur spec R exhaust. kinda loud but i felt some gains also. the quality of the pacesetter header was absolute crap. it got rusty 1 day after i drove it. the reason i picked this header over hotshot, OBX, and DC sports was because pacesetter is the only company on the market that makes a 4-1 header. 4-1 is mainly made for top end gains.
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