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Race on Sunday, Fix on Monday. Buildjournal is an independent enthusiast site dedicated to BMW motorsports, track go-ers and auto photographers.
As enthusiasts ourselves, we provide the BMW community with technical articles, product reviews, DIY guides, industry news also tons of photos and videos.
03/25/2026
Pick 1. E92 M3 or G80 M3 or E46 M3.
Small compilation of my S54 exhaust setup with 6 into 1 headers. All but the last clip is running ARH headers + Race Exhaust (resonated). The last clip is a custom header back exhaust from . If you want to hear more of the custom exhaust, just say it in the comments!
ARH 6-into-1 headers on the E46 M3 focus on high-RPM power rather than low-end torque. Dyno testing showed significant top-end gains over stock and traditional header setups when paired with a proper tune, but with some torque loss below ~5,000 RPM. Build quality and sound are excellent, and the headers really shine on track where the S54 lives in the higher rev range. Best suited for drivers chasing peak power and performance, not low-RPM street torque. Thanks to european auto source for the dyno time.
Not your typical S54 exhaust note.
02/03/2026
I just redesigned our harness collars for builders chasing every last gram. Same function, less weight. Made from carbon fiber–infused nylon instead of metal, these collars shed weight without sacrificing strength. If a part doesn’t need to be metal, why carry the extra weight?
Made for the “remove every unnecessary bolt” crowd. 🏁 Check it out on our website!
E46 M3 vs E46 M3 at Buttonwillow CW13.
01/27/2026
Back in 2022, when my E46 M3 was slowly transforming into a lightweight T/A monster.
12/24/2025
About 6 months and counting since my last track day with the E46. Been too long.
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