Ultimate PSI

04/09/2026

Ultimate PSI Aluminum Upper Radiator Hose Fittings BMW E9x/E8x N54/N55/N52

CNC-Machined Aluminum Upper Radiator Hose Fitting ,Replace the weak OEM plastic fitting with a stronger, more reliable aluminum solution.

CNC-machined for precise fitment, superior durability, and long-lasting performance.

Stronger. Precise. Built to last. 🔧🏁

03/09/2026

No better sound than titanium. 💨

Sick G82 M4 × Ultimate PSI Titanium Front Mount Intake 👌🏻

Hear it. Feel it. Let it scream. 🏁

12/08/2026

G20 ECU Unlock 🔓

ECU out, unlocked, and ready for tune 🔥

28/07/2026

BMW 340i B58 is now equipped with our Ultimate PSI Charge Pipe and an in-house ECU unlock, ready for the next stage .

13/07/2026

Another dream build brought to life. 🔥

This BMW F20 M135i N55 came to us with one goal: build it right.

Every part on this build was supplied through Ultimate PSI. The customer chose our complete Ultimate PSI bolt-on package, including our Crank Bolt Capture for added protection and ACL Rod Bearings for maximum reliability. Any additional components outside our product line were sourced by us from the USA, giving the customer everything needed to complete his dream build.

To complete the package, we tuned the engine with bootmod3 , optimized the transmission with xAutomotive , and verified the results on the dyno to ensure everything performed exactly as expected.

The result? A compact xDrive monster that delivers incredible power, lightning-fast shifts, and unbelievable traction. This little beast is a perfect example of what the N55 platform is capable of when built and calibrated the right way. 💙

06/07/2026

06/07/2026

19/06/2026

ULTIMATE PSI S55/N55 Crank bolt capture

Protect your N55 or S55 engine with the Ultimate PSI Billet Aluminum Crank Bolt Capture Kit.

CNC-machined from high-quality billet aluminum and finished with a durable anodized coating, this plug-and-play upgrade helps prevent crank bolt loosening caused by vibration, providing an extra layer of protection against potential crank hub failure.

✅ Fits BMW N55 & S55 engines
✅ CNC-machined billet aluminum construction
✅ Durable anodized finish
✅ Helps prevent crank bolt loosening
✅ Added protection against crank hub failure
✅ Complete plug-and-play kit
✅ Includes all hardware required for installation
✅ Ideal for stock and high-performance builds

A simple upgrade that adds peace of mind and helps protect your engine investment.