4 Piston Cylinder Heads

06/19/2026

🚨 New Product Alert 🚨
Available to Order August 1

Take your K20C Honda Accord oiling system to the next level with our new Type R Oil Pump Conversion and Race Baffle Package.

✔ Type R Oil Pump Conversion Kit
✔ Genuine Type R Windage Tray
✔ Available with the 4P Race Baffle for superior oil control under hard acceleration, braking, and cornering

Built for enthusiasts who push their cars beyond the limits of the factory oiling system. Whether you’re road racing, time attacking, or enjoying aggressive street driving, this upgrade helps keep oil where it belongs.

Available August 1

06/18/2026

This K24Z7 has our R40 4 Port Race casting. It takes this >240hp Mugen open wheel setup to a true 360+hp NA.

06/16/2026

Make sure you read all about this at 4Piston.com

06/10/2026

FL5 Turbos available !!!!!!!!!!! These are brand new FL5 OEM turbo chargers that have never been operated. We remove them from crate engines that we purchase from Honda that we are building to 600hp with larger turbos

06/10/2026

27 years ago I had just completed an LSVTEC all motor setup in my EM1. I rolled to the spot in Indy looking for some races and ended up finding it in a very light B-Series CRX HF. Ryan’s CRX was faster than I expected, and my EM1 was faster than he expected. 27 years later we get to deliver him this H22 for his project. A full circle moment.

06/10/2026

Precision machining. Second to none. 4P Kingpin 👑

06/10/2026

Go check the full video on .usa YT and follow

06/09/2026

You all should watch this all the way through. Dream about it…be inspired

Ask anyone who grew up on Hondas about the EK9 Civic Type R and you...

06/08/2026

Reid takes the big check home 🏆

DM us your 4P powered victories and you may be featured for our 300k followers.

06/08/2026

The K20C1 deserves more than stock.

Our Stage 3 K20C1 Race Engine combines a fully CNC ported race head, 4P camshafts, forged internals, and proven engineering to support 800+ horsepower builds. Built to make power, hold RPM, and survive where lesser combinations don’t.

Designed, machined, and assembled by one of the most experienced Honda engine development teams in the industry.