● Now partnered with 22RPD — all tunes available at 22rpd.com
Bavarian Auto Parts
Shop Now
The Build Log

Builds & guides.

Deep-dives, how-tos, and real builds from the shop — exhaust guides, engine breakdowns, DIY tips, and the data behind the power.

The Ultimate N52 + N51 Exhaust Guide
Latest
February 15, 2026

The Ultimate N52 + N51 Exhaust Guide

Read more
BMW N52 Engine: The Last Great Naturally Aspirated Inline-Six
February 07, 2026

BMW N52 Engine: The Last Great Naturally Aspirated Inline-Six

Read →
Tools for the BMW DIYer
January 05, 2026

Tools for the BMW DIYer

Read →
How to 8HP Swap an E90 + E92
December 30, 2025

How to 8HP Swap an E90 + E92

Read →
How to Make 500WHP on an N52
June 03, 2025

How to Make 500WHP on an N52

Read →
Transforming the 2006 BMW 330i: A Supercharged Autocross Weapon
December 05, 2024

Transforming the 2006 BMW 330i: A Supercharged Autocross Weapon

Read →
Retrofitting a 6HP21 into a 2006 330i
November 29, 2024

Retrofitting a 6HP21 into a 2006 330i

Read →
Raimund's E90 330i Build
July 30, 2023

Raimund's E90 330i Build

Read →
Build yours next

Shop the parts

Everything in these builds — tunes, velocity stacks, and bolt-ons.

Shop the catalog