Introducing the most advanced oil pump available today. Instead of just following the competition we took our own approach. The Peterson R4 features our patent pending 4 lobe aluminum rotor design which has been proven in independent testing to provide excellent flow, amazing vacuum and rock steady oil pressure even at high oil temps. We also have invested in new machines to streamline manufacturing so not only is this pump advanced but also affordable. Other features include new modular mount system, shallow mount lightweight fittings and lightweight aluminum construction. Rear Drive R4 Pumps require an additional adaptor to mount the Sweet Power Steer with Bracket. Adaptor required is 14-2190.