Upgrade your 1964-1966 Mopar A-Body with the SST Crossmember (XMM-00300), engineered in-house by Silver Sport Transmissions for TREMEC TKO and TKX 5-speed transmissions. Built from heavy-duty box-welded steel, this crossmember delivers OE-level strength and durability with a precise fit and maximum clearance. Designed to fit classic Mopar models including Dart, Valiant, and Barracuda, it simplifies manual transmission conversions and performance upgrades. Whether restoring or upgrading your Mopar A-Body, trust SST for high-quality, reliable components engineered to provide long-lasting performance and easy installation.