Manual Transmission only; Fits E36 w/ M50, S50 and S52 Engines E36 and E36 M3 w/ 6 Cyl. (also fits 88-91 E30 w/ M20 6 cyl. only)
Koyorad's new 48mm “HH” Series radiator core features an ultra high fin density to maximize heat transfer. Koyo designs and manufactures each radiator with precision; therefore each one is a direct-fit performance replacement for the stock OE plastic/aluminum radiator for a quick and simple installation with no modifications.
Koyo has also integrated a 1/8” NPT female accessory fitting (supplied with a threaded plug) to accept temperature sensors typically included with aftermarket temperature gauges.
*Features*
* Koyorad “HH” Series 48mm Hyper Core
* OE Specific mounting and direct fit * Nocolok-R Brazing
* Precise Tube and Fin alignment
* Billet aluminum filler neck
* 1/8” NPT female accessory fitting
This Part Fits: 
| Year | Make | Model | Submodel | 
|---|---|---|---|
| 1998-2000 | BMW | 323i | Base | 
| 1998-1999 | BMW | 323is | Base | 
| 1988-1995 | BMW | 325i | Base | 
| 1988-1995 | BMW | 325is | Base | 
| 1988-1991 | BMW | 325iX | Base | 
| 1996-2000 | BMW | 328i | Base | 
| 1996-1999 | BMW | 328is | Base | 
| 1995-1999 | BMW | M3 | Base | 
| 1995 | BMW | M3 | Lightweight | 
| 1999 | BMW | Z3 | Coupe | 
| 1997-1999 | BMW | Z3 | Roadster |