The #1 Place for BMW Performance Parts & Mod Guides

Shop BMW Performance Upgrades, Mod Courses, or read one of our hundreds of articles on tuning and performance modifications.

Shop by Engine

BMW Modification & Tuning Courses

The most in-depth courses covering every performance modification available. From engine power limits to bolt-on mods, tuning, turbo and fueling upgrades, built motors and everything in-between.

Mod Guides & Resources

N63 600whp Guide

How to Build a 500+WHP BMW N63 for Under $1,500

BMW has shown their commitment to the BMW N63 engine. It was first released in 2008 and remains in production as of 2020. The twin turbo 4.4L V8 N63 received a few updates along the way. 2012 saw a large improvement (N63TU) with the addition of valvetronic, revised turbos, lighter pistons, forged rods and crank,…
S55 600whp Guide

How to Build a 600WHP BMW S55 M3/M4 for $2,000

BMW really did it this time. The N54 shattered expectations in the tuning world, but suffered early reliability issues. BMW took a step back with the N55, focusing on improving reliability. Enter the BMW S55. The engine that took some of the great aspects from each engine, but took it 7000 levels higher. BMW’s S55…
B48 300whp Guide

B48 Tuning Guide – 300whp for $1500

The B48 is one of BMW’s newer modular engines, that are fitted in a host of entry-level models in their lineup including the 230i, 330i, 430i, and 530i.  You will find this 4-cylinder turbo to be responsive and fuel-efficient. However, once you get used to the power, the B48 may feel a bit flat and could…
S63tu 700hp Guide

How to Build a 700HP+ BMW S63tu for Under $1,500

The BMW S63tu is a 4.4L twin turbo V8 found in 2012-2017 M5 and M6 models. It produces an astounding 560hp and 500 lb-ft of torque from the factory. Even better, like many BMW engines, the S63 is also underrated. Aftermarket dyno tests show the S63 around 530whp and 520wtq. Nor does it end there….
B58 500hp Guide

How to Build a 500HP 40i B58 BMW for Less Than $1,500

The B58 is the successor to the N54 and N55 engines, both of which were highly tune-able and able to make lots of horsepower with only a handful of supporting mods. The N54 takes the cake in regards to horsepower capabilities, but it had many engine problems as a result. The N55 platform was made…
N20 350whp Guide

BMW N20 Tuning Guide – 350hp for $1,500

BMW’s N20 engine featured in the 228i, 328i, 428i, 528i, as well as other 28i variants, did not built up the greatest aftermarket and tuning reputation, as the engine has been touted as fragile. Although the N20 is not the strongest motor there is still plenty of power to be unleashed with a tune and…
Best N52 Performance Mods

Bolt-On BMW N52 Performance Mods

Alright, this is a tough article to write after we’ve written so much of this content for turbo BMW engines. The N52’s performance potential is often overshadowed by that of the N54 and other turbo BMW engines. When it comes to N52 performance mods, many will simply say, “buy a turbo BMW”. We’re here to…

Video Guides