Iv'e Installed 3 sets Of The SMA Headers with no
Problems With Leakage. Yes They Are A Flat 3 Bolt Flange At The Collector, Bolts Right Up to Your Factory Y-Pipe With Factory Gaskets.
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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