The EVO I Performance Intercooler Kit from Wagner Tuning fits to:

BMW 135 i E82/E88
BMW 335i E90/91/92/93
BMW Z4 35i E89

Stepped High Performance Intercooler Core
Size 520 x 210 x130, 11.752cm? Volume (OEM 510x130x110mm, 7293cm? Volume)
CAD / FEM optimized Aluminum Cast End Tanks
Plug & Play Installation using the stock plumbing,
No cutting or bumper removal required
Approx. 85% bigger surface over OEM IC