Product Overview GKC 21/28-S 5.5GPM 4000PSI SUPER DUTY 1450RPM 24mm SOLID SHAFT FEATURES: Oversized bronze connecting rod assemblies with guide pins for perfect cap alignment 2 lbs. each Heavy duty reinforced heads with external and internal bracing Large diameter niploy plated valve caps with increased thread depth Reinforcing ring on inlet and discharge ports Deeper back cover for increased oil capacity, 40 oz crankcase capacity SPECIFICATIONS: maximum flow: 5.5 GPM Maximum pressure: 4000 PSI Maximum pump speed: 1450 RPM Shaft size: 24mm solid Power requirements: 15.0 electric 19.5 gas Seal Kit: UD-10 Valve Kit: UD-31 RAIL KITS NOT INCLUDED Reviews (No reviews yet) Write a Review