C3 Corvette Big Block HeadersARH C3 Corvette header systems are now available for conventional Big Block applications. Maintaining our tradition for outstanding 100% US made quality, our C3 Big Block headers are available with 1 7 8" and 2" primaries to accommodate your desired application. Also Our C3 Big Block headers are offered with Round , Square and D Port Flanges to meet your vehicle's needs. If you've swapped your C3's stock engine in favor of an LS engine, we've also got
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