New Arrivals
Performance Parts for Enthusiasts
Turbos, carbon fiber, suspension & tunes for BMW, Porsche, Mercedes & more
Find Parts for Your Vehicle
★ 4.8 Rating (86+ Reviews)
Fast Shipping
Expert Support
Enthusiast-Owned
Shop by Vehicle
New Arrivals
Featured Products
![2020-2021 Honda Civic Rear Diffuser (Hatch [Sport, Sport Touring]) V5](http://manjiusa.com/cdn/shop/products/275186342_1847925015412614_4780658297403990107_n_1296x_3f107258-547c-4101-8795-8e1bed7be81c.webp?v=1678419911&width=600)
Added to cart!
Performance Tuning
Unlock Your BMW's Power
MHD & Bootmod3 flash tunes for N54, N55, S55, B58 and more. +100whp with bolt-ons.
Shop TunesOur Story
Built by Enthusiasts
Founded by Austin Adler — racer, builder, and BMW enthusiast. Currently competing on European circuits, Austin curates parts he trusts for his own builds. Every product we sell is chosen by someone who actually drives these cars.
Learn More → Featured Brands
Shop the Best Brands
Authorized dealer for the brands that actually make a difference on track and on the street.
Customer Reviews
What Our Customers Say
Real reviews from real enthusiasts who've built with Manji parts.
4.8
86+ verified reviews
CTS Stage 2 kit transformed my N55. Manji had it shipped in 2 days and the install guide they sent over was perfect. This is how a performance shop should operate.
I've ordered from three different shops and Manji is the only one that actually knows what they're selling. They helped me choose between KW V3 and H&R — no upsell, just solid advice.
RW Carbon spoiler is flawless. Fitment on my F82 was perfect, finish is incredible. Will be ordering the front lip next.
Pure Stage 1 on my B58 — gained 60whp on a stock tune. Austin walked me through the whole process. This team genuinely cares about your build.
Fast shipping, great packaging, and the part was exactly as described. The MHD tune they recommended works perfectly with the CTS charge pipe.
H&R springs on my Audi. Exactly the drop I wanted — aggressive without ruining daily drivability. Manji was way faster to ship than my usual supplier.