The 2nd generation of the Narrow SL6 series has been redesigned with Wilwood’s latest technology. High strength Billet bodies with internal crossover passages allow the calipers to mount in either front or rear of spindle applications with same part number. With Same 3.50" centered lug mounting of original Narrow Superlite caliper. Each caliper is precision CNC machined from high strength Billet Forging with a re-profiled outer body that enhances wheel clearance and appearance. Calipers are available in Black, Red powder coat and a show quality polished finish to compliment any application.