Wilwood iron GM-Metric Brake Calipers from Accesspeed combine new part quality with modern machining precision. These are new - not rebuilt - Brake Calipers, purpose built for racing, and are bolt-on replacements for 1978 and later GM Metric Brake Calipers widely used in "spec" racing categories. Wilwood’s new 2.50” piston GM Metric Brake Calipers are now officially approved for IMCA as OEM replacement Brake Caliper that meet all rules in Modified, Stock Cars, Hobby Stocks, Northern and Sothern Sport Mods. The GM Metric Brake Caliper is also available in 2.75” and 2.00” piston sizes for use in other non-restricted series or applications. Brake Calipers require use of hardened Wilwood slide pins (sold separately), request part no. 230-0619 (slide pin kit) that contains 4 slide pins, enough for two Brake Calipers. Wilwood offers three piston size options to properly build static bias into a car. Previously, builders using the metric Brake Calipers generally had to mount the same size Brake Calipers on all four wheels. This drastically limited the tuning options and often created front to rear bias ratios that were not conducive to good handling and stability under hard braking. Some builders, and other brake suppliers, chose to offer re-machined OE Brake Calipers to provide a bias tuning option. Unfortunately, re-machining a used casting that was never designed for the larger bore size, can create real compromises in strength, reliability, and performance. Wilwood has tooled three separate castings that are fitted with 2.75", 2.50” or 2.00" stainless steel pistons and high temperature bore seals. Each casting is designed specific for its intended bore size. The Brake Calipers are strong and precise, without unnecessary added weight from oversized castings. The stainless steel pistons resist corrosion while helping to slow the heat transfer from the pads. The high temperature seals provide long service life when used in hard braking applications and maintain their resilience to provide positive piston retraction on release.
