Complete set of 24 Supertech STD engine valves for all / Compatible with M50, M52, M54, S50, S52 BMW 24V 2.8L-3.0L (M50 M52 M54 S50 S52)
BMIVN-1030S x 12 (intake)
BMEVN-1030S x 12 (exhaust)
KPR-6S-7 x 48 (single groove keepers)
Head Diameter: 33.0mm (intake)
30.5mm (exhaust)
Stem Diameter: 5.97mm (intake)
5.96mm (exhaust)
Valve Length: 106.1mm (intake)
105.65mm (exhaust)
Material: Black Nitrided
BLACK NITRIDE:
This is a hardening treatment that even though it is not widely used as the chrome coating, it has several benefits and is becoming very popular, mainly for European and Japanese applications.
The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (microhardness is 800HV minimum).
Surface finish is smoother than with chromed stems, having less friction between stem and guide.
Valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Matches any kind of seats (nodular iron seats, steel powder metal seats, hard aluminum-copper seats or beryllium copper seats).
Higher rpm's engines take full advantage of all previous features. The higher the engine speed the bigger the power loss due to internal engine friction! The black nitride layer reduces this power loss due to less valve-guide friction.
The nitrided layer is adhered to the base material at a microscopic level, so does not "flake" or break when the valves bend due to impacts with the pistons.
The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem.
All valves are swirl polished, have stem undercut and a hardened tip.
Notes | Year | Make | Model | Trim | Engine |
| 2006 | BMW | 330Ci | All | All |
| 2006 | BMW | 330xi | All | All |
| 2006 | BMW | X3 | 3.0i Sport Utility 4-Door | All |
| 2006 | BMW | Z4 | Coupe 3.0si Coupe 2-Door | 3.0L 2996CC l6 GAS DOHC Naturally Aspirated |
| 2006 | BMW | Z4 | Roadster 3.0i Convertible 2-Door | 3.0L 2996CC l6 GAS DOHC Naturally Aspirated |
| 2006 | BMW | Z4 | Roadster 3.0si Convertible 2-Door | 3.0L 2996CC l6 GAS DOHC Naturally Aspirated |
| 2005 | BMW | 330Ci | All | All |
| 2005 | BMW | 330Ci | M Coupe 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2005 | BMW | 330xi | All | All |
| 2005 | BMW | 530i | All | All |
| 2005 | BMW | X3 | 3.0i Sport Utility 4-Door | All |
| 2005 | BMW | X5 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2005 | BMW | Z4 | 3.0i Convertible 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2004 | BMW | 330Ci | All | All |
| 2004 | BMW | 330xi | All | All |
| 2004 | BMW | 530i | All | All |
| 2004 | BMW | X3 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2004 | BMW | X5 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2004 | BMW | Z4 | 3.0i Convertible 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2003 | BMW | 330Ci | All | All |
Notes Important part details | Year | Make | Model | Trim | Engine |
| 2003 | BMW | 330xi | All | All |
| 2003 | BMW | 530i | All | All |
| 2003 | BMW | X5 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2003 | BMW | Z4 | 3.0i Convertible 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2002 | BMW | 330Ci | All | All |
| 2002 | BMW | 330xi | All | All |
| 2002 | BMW | 530i | All | All |
| 2002 | BMW | X5 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2002 | BMW | Z3 | Coupe Coupe 2-Door | All |
| 2002 | BMW | Z3 | Roadster Convertible 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2001 | BMW | 330Ci | All | All |
| 2001 | BMW | 330xi | All | All |
| 2001 | BMW | 530i | All | All |
| 2001 | BMW | X5 | 3.0i Sport Utility 4-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2001 | BMW | Z3 | Coupe Coupe 2-Door | All |
| 2001 | BMW | Z3 | Roadster Convertible 2-Door | 3.0L 2979CC l6 GAS DOHC Naturally Aspirated |
| 2000 | BMW | 328Ci | Base Coupe 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
2.8L & 3.0L only | 2000 | BMW | 528i | Base Sedan 4-Door | All |
| 2000 | BMW | Z3 | Coupe Coupe 2-Door | All |
| 2000 | BMW | Z3 | Roadster Convertible 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
Notes Important part details | Year | Make | Model | Trim | Engine |
| 1999 | BMW | 328i | Base Convertible 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
| 1999 | BMW | 328is | Base Coupe 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
2.8L & 3.0L only | 1999 | BMW | 528i | Base Sedan 4-Door | All |
| 1998 | BMW | 328is | Base Coupe 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
2.8L & 3.0L only | 1998 | BMW | 528i | Base Sedan 4-Door | All |
| 1997 | BMW | 328is | Base Coupe 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
2.8L & 3.0L only | 1997 | BMW | 528i | Base Sedan 4-Door | All |
| 1996 | BMW | 328is | Base Coupe 2-Door | 2.8L 2793CC l6 GAS DOHC Naturally Aspirated |
| 1995 | BMW | M3 | Base Coupe 2-Door | 3.0L 2990CC l6 GAS DOHC Naturally Aspirated |
| 1995 | BMW | M3 | Lightweight Coupe 2-Door | 3.0L 2990CC l6 GAS DOHC Naturally Aspirated |
| 1994 | BMW | M3 | Base Coupe 2-Door | 3.0L 2990CC l6 GAS DOHC Naturally Aspirated |