Engines and Components› Oiling Systems

4 Piston Racing

4P Ported H22 Oil Pump

$495.00

SKU: 4PR-HPUMP

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The 4 Piston Racing 4P Ported H22 Oil Pump is an upgraded oil pump designed for Honda H22 engines. This pump addresses common issues with the stock H22 oil pump, such as cavitation and pressure loss at high RPMs and elevated oil temperatures, particularly in endurance applications.

It starts with a new OEM Honda oil pump, which is then disassembled to port and smooth the oil passages, increasing flow. The pumps are meticulously cleaned, oiled, reassembled, and repackaged.
Show original supplier description
The 4 Piston Racing 4P Ported H22 Oil Pump is a performance upgrade designed to overcome the limitations of the stock oil pump in Honda H22 engines. The factory H22 oil pump is known to cavitate and lose pressure during high RPM operation and when oil temperatures rise, especially in demanding applications like endurance racing. This ported oil pump enhances flow and eliminates cavitation by modifying a brand-new OEM Honda oil pump. The process involves disassembling the pump, carefully porting and smoothing the internal oil passages to improve flow dynamics, and then reassembling the unit after thorough cleaning and lubrication. This ensures a reliable and robust solution. By addressing the weak points of the stock oil pump, this unit acts as a crucial protective measure for expensive engine builds. It provides essential insurance against potential oil pressure related failures, ensuring the longevity and performance of your H22 engine investment.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Available on iOS & Android

Specifications

Brand4 Piston Racing
Part Number4PR-HPUMP
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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