Alfa Romeo 4C Spider carbon Extreme air extractor covers

Product description

Koshi carbon Extreme air vent covers 4C Spider only

These Koshi Extreme frames outline the rear air outlet area of the Alfa Romeo 4C Spider in carbon. The two illustrated pieces combine several apertures with pronounced tapered points. Koshi explicitly limits AR4C-020 to the Spider; the shared 4C model name does not make this version suitable for the Coupe.

Shaping around the rear openings

The article covers the existing OEM components. The vent area gains a different visible surround while the original openings remain recognisable. Extreme describes the design; there are no verified airflow, cooling or aerodynamic improvement figures for this product.

Prepreg carbon for the Spider

Koshi specifies 0.6 mm prepreg carbon, autoclave curing and high-gloss clear coat. Sharp contours and open cut-outs define the appearance. Match this particular Spider vent shape during installation and keep the original openings clear. A rear diffuser or complete replacement body panel is not part of this frame cover.