The JCX blog

Guides from the shop floor

Fitment guides, style decoders and install notes written by the people who sell and fit these parts.

Latest · Engine & Charge

F80 equal length vs single midpipe, and the G80 Z-pipe options

Equal length or single midpipe on the S55 F80 and F82, which G80, G82 or G87 midpipe or valved system to pick, and straight answers on drone and tunes.

September 30, 2026 · 9 min read

Engine & Charge

B58, S55 and S58 downpipes: catless, tunes and which to buy

What a downpipe does on a turbo BMW, catless vs catted, why it needs a tune, and how to order the right B58 Gen 1, B58 Gen 2, S55 or S58 downpipe.

September 29, 2026 · 9 min read

Engine & Charge

Charge pipes explained: why the factory plastic fails on the B58 and S55

Why the plastic charge pipe on the B58 and S55 cracks or blows off, what the failure feels like on the road, and how to order the right aluminium replacement.

September 12, 2026 · 8 min read

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