Oil Cooler Guard for the G80 M3, G82 M4 and G87 M2: Does the S58 Need One?
The S58's engine oil cooler sits low under the nose of the G80 M3, G82 M4 and G87 M2, behind an undertray with no screen. Here's…
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The Unit 17 blog
Buying guides, fitment advice and build notes for carbon fiber parts on BMW M, Mercedes and Audi.
G87 M2 Carbon Mods: What to Fit First, With Prices
The carbon parts G87 M2 owners buy from us most, a sensible order to fit them, what each costs and what to check before you order.
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BMW X3M & X4M (F97/F98) Carbon Parts: LCI vs Pre-LCI Front Lips, Spoilers and Fit
BMW redesigned the X3 M and X4 M front bumper for 2022, so front lips are generation-specific. Here's how to tell which car you have and…
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G80 M3 & G82 M4 Side Skirts: Extensions vs Full Replacement
Carbon G80 M3 side skirts come in two kinds: extensions that sit under the factory sill and full replacements for its gloss black trim. Here's how…
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G87 M2 Spoiler and Trunk Guide: OEM++ vs MP Style vs CSL-Style Trunk (and the M2 CS Question)
A plain guide to the G87 M2 spoiler choices: lip spoilers that mount on the factory trunk, full CSL-style carbon trunk lids, BMW's M Performance part…
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G80 M3 & G82 M4 Carbon Mods: What to Fit First, With Three Real Builds
What G80 M3 and G82 M4 owners order most from us, a sensible order for carbon mods, what each step costs, and the carbon on three…
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G80 M3 & G82 M4 LCI vs Pre-LCI: What Changed and What Still Fits
For 2025, BMW updated the G80 M3 and G82/G83 M4. Here's what changed, what stayed the same, how to tell which car you have, and which…
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G80 M3 & G82 M4 Rear Diffusers: D3 vs MP Style vs F1 Brake Light
The carbon rear diffusers, trims and corner pieces we sell for the G80 M3 and G82/G83 M4, compared: what each one covers, which has a brake…
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How to Install a G80 M3 or G82 M4 Grille, Front Lip and Diffuser
How carbon exterior parts go onto a G80 M3 or G82/G83 M4, from the quick rear corners to the bumper-off grille swap: tools, steps, and when…
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Does Your G80 M3 or G82 M4 Have the Front Radar? Grille Radar and Badge Guide
Two things decide which grille your M3 or M4 can take: whether it has the front radar for Active Cruise Control, and how your badge moves…
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