CSF Universal Dual-Pass Oil Cooler / RS Porsche / M22 x 1.5 / 22L x 4.75H x 2.16WCSF offers the best and most advanced Oil Coolers on the market. So when it comes to keeping your engine oil temps down as you push your Universal 73' Porsche 911 RS Style Bumper hard on the street or track, a CSF is the obvious choice. Dual Pass Oil Cooler Overall: 22" L x 4. 75" H x 2. 25" W Core Surface: 18. 9" L x 4. 72" H x 2. 25" W Direct Fit for Porsche '73 RS Style Front Bumper High Efficiency & Rugged Durability Bar Plate Design M22 x 1. 5