Acura RSX Type S PRB Oil Pump 15100-PRB-A01

Hybrid Racing K20A2 RSX Type S Oil Pump (Cut for K24) - K Series Swap

You're building a K24 or swapping one and you need an oil pump that doesn't rob horsepower and actually maintains pressure at high RPM. The stock K24 oil pump's heavy. It's got balance shafts that suck up 10-15 hp just spinning around doing nothing. The pump also struggles to maintain oil pressure when you're running 8000+ RPM. The K20A2 oil pump from the RSX Type S doesn't have balance shafts. It's lighter. It flows better. It holds pressure at high RPM. The problem's the K20A2 pump doesn't bolt directly to a K24 block without modifications. Hybrid Racing's cut K20A2 oil pump solves that. We've machined the pump so it clears the K24 block and installs without grinding or custom work. You're bolting it on with the correct windage tray, chain, tensioner, and hardware. No balance shaft drag. Better oil pressure. More power. This is what you install when you're building a high-RPM K24 and you're done losing power to the stock pump.

Here's Why the Stock K24 Oil Pump Kills Power

The stock K24 oil pump uses balance shafts to smooth out engine vibration. The shafts spin at twice engine speed. They're heavy. They're parasitic. You're losing 10-15 hp at the wheels just to spin those shafts around. That's power you're making but you're not putting to the ground. The stock K24 pump also struggles to maintain oil pressure at high RPM. If you're building a K24 that revs to 8000-8500 RPM or higher, the stock pump can't keep up. Oil pressure drops. Bearings suffer. The K20A2 oil pump from the RSX Type S doesn't have balance shafts. It's a simpler pump. It's lighter. It flows better. It maintains pressure at high RPM because it's designed for the K20A2 which revs higher than the K24. The K20A2 pump's the standard upgrade for built K24 engines. The problem's it doesn't bolt to a K24 block without modifications. You have to cut the pump to clear the K24 block casting. Hybrid Racing's done that work for you. The pump's already cut and ready to install.

Pre-Cut for K24 Installation - No Grinding Required

The K20A2 oil pump interferes with the K24 block casting. You can't just bolt it on. You have to remove material from the pump housing so it clears the block. Most people use a die grinder or a belt sander and remove material until it fits. That works but it's time-consuming and you're eyeballing the clearance. Hybrid Racing's pre-cut this pump for you. We've machined the interference area so the pump clears the K24 block and bolts up correctly. You're not grinding. You're not test-fitting and removing more material. You're installing the pump with the correct windage tray, chain, tensioner, and hardware. It fits. This is the pump you order when you're swapping a K24 and you don't want to spend an afternoon grinding an oil pump.

Requires K20A2-Specific Parts for Installation

You can't use the stock K24 windage tray, chain, tensioner, or hardware with the K20A2 pump. The K20A2 pump requires K20A2-specific parts. You need the K20A2 windage tray (11221-PNC-000), windage tray bolts (95701-06014-08, need six), K20A2 oil pump chain (13441-PCX-004), K20A2 chain guide (13460-PNC-004), K20A2 chain tensioner (13450-RAA-A02), and K20A2 oil pump hardware (three different bolts with part numbers 95701-06025-08, 95701-08050-08, and 95701-08075-08). That's a lot of parts to track down individually. Hybrid Racing offers a complete installation kit that includes everything except the pump. Order the pump and the installation kit and you've got everything you need. If you're sourcing the parts yourself, make sure you're getting K20A2 parts and not K20Z1 or K24 parts. The part numbers are different and they don't interchange.

What You Get

• Hybrid Racing pre-cut K20A2 oil pump (Honda OEM part 15100-PRB-A01)
• Pre-machined for K24 block clearance (no grinding required)
• No balance shafts (eliminates 10-15 hp parasitic loss)
• Better oil pressure at high RPM (designed for high-revving K20A2)
• Direct bolt-in with correct K20A2 windage tray, chain, tensioner, and hardware
• OEM Honda quality
• Cut and prepared by Hybrid Racing

Required Parts for Installation (Not Included)

• K20A2 windage tray: 11221-PNC-000
• Windage tray bolts (x6): 95701-06014-08
• K20A2 oil pump chain: 13441-PCX-004
• K20A2 chain guide: 13460-PNC-004
• K20A2 chain tensioner: 13450-RAA-A02
• K20A2 oil pump hardware: 95701-06025-08 (x1), 95701-08050-08 (x1), 95701-08075-08 (x1)
• Or purchase Hybrid Racing K20A2 Oil Pump Installation Kit (includes all parts above)

Fits These Builds

• K24 engine builds (all variants: K24A, K24A2, K24Z, K24W)
• K24 swaps into any chassis (Civic, Integra, CRX, etc.)
• High-RPM K24 builds (8000+ RPM)

Note: Pre-cut K20A2 oil pump for K24 installation (Honda OEM part 15100-PRB-A01 machined by Hybrid Racing for K24 block clearance). Eliminates balance shafts (saves 10-15 whp parasitic loss from stock K24 pump). Improves oil pressure at high RPM (K20A2 pump designed for higher-revving engine than K24). Requires K20A2-specific installation parts (windage tray, chain, tensioner, hardware - NOT included with pump, sold separately or as complete installation kit). Do NOT use K24 windage tray, chain, or hardware (parts are not interchangeable). Refer to factory service manual for installation procedure and torque specs. Common upgrade for built K24 engines and K24 swaps. Pre-cut by Hybrid Racing (no grinding or custom fitment required). Direct bolt-in with correct K20A2 parts. Made by Hybrid Racing.