BMW 5 Series E34
Manufacturers
BMW 5 Series E34

Subcategories
Uprated engine parts for the M50B20 six-cylinder of the BMW 520i E34, in the non-VANOS form built from 1990 to 1992. Valve timing relies on CATCAMS Sport camshafts and their mechanical cam followers, specific to this version of the block. Head sealing is handled by a COMETIC gasket, while ARP covers the three critical joints: head studs, main studs and con rod bolts. Big end and main bearings are offered in ACL Race and King Racing, from standard size to repair sizes up to +0.50mm, with the pMaxKote anti-friction coating on the King Racing range. A 1000cc Fuel Injector Clinic high impedance injector completes the fuelling.
Uprated engine parts for the M50B20TU six-cylinder of the BMW 520i E34, the VANOS version built from 1992 to 1996. The VANOS timing takes its own CATCAMS Sport camshafts and mechanical cam followers, which are not interchangeable with the earlier block. Unlike the non-VANOS page, this one also carries uprated valve springs, available in SUPERTECH and in CATCAMS. A COMETIC gasket seals the head, and ARP supplies the head studs, main studs and con rod bolts. Big end and main bearings come in ACL Race and King Racing, from standard size to +0.50mm repair sizes, and a 1000cc Fuel Injector Clinic injector covers the fuelling side.
The M20B25 is the only belt-driven 12-valve engine of the BMW 5 Series E34 range, and this page gathers what we hold for it. Forged pistons come in WISECO, WISECO AP and WOSSNER from 84 to 85mm and 8.8:1 to 11.6:1, with a second WISECO AP set intended for a build using the longer-stroke M20B27 crankshaft, at 8.5:1 and 10:1. ZRP forged rods measure 135mm centre to centre. The head takes SUPERTECH intake and exhaust valves, SUPERTECH 7mm collets, a COMETIC MLS gasket in 85.0mm or an ATHENA O-ring at 85.5mm, and ARP head studs. Vernier cam pulleys are available in KENT CAMS and CATCAMS.
Uprated engine parts for the M50B25 of the BMW 525i E34, in the non-VANOS form built from 1990 to 1996. This is the best stocked head page of the range: intake and exhaust valves in SUPERTECH and FERREA, in standard size and +1.00mm, with an Inconel option on the exhaust side, plus SUPERTECH guides, 6mm stem seals for both sides and 6mm collets. The bottom end takes WISECO and WISECO AP forged pistons from 84 to 85mm at 8.8:1 or 11:1, and ZRP rods at 135mm centre to centre. Head sealing is COMETIC MLS and MLX or ATHENA O-ring, with ARP studs and bolts throughout.
Uprated engine parts for the M50B25TU of the BMW 525i E34, the VANOS version built from 1992 to 1996. Two figures separate it from the earlier block: the ZRP forged rods measure 140mm centre to centre instead of 135mm, and the forged pistons are WISECO only, from 84 to 85mm at 8.8:1 or 11:1. The VANOS timing takes its own CATCAMS camshafts and cam followers, and this page also carries uprated valve springs in SUPERTECH and CATCAMS. The head shares the rest with its sister page: SUPERTECH and FERREA valves, guides, 6mm stem seals and collets, COMETIC or ATHENA gaskets and ARP fasteners.
The M60B40 is the only V8 of the BMW 5 Series E34 range, and our selection for it is deliberately narrow. Valve timing comes first: CATCAMS Sport camshafts, their mechanical cam followers and CATCAMS inner valve springs, completed by a set of dual valve springs. Head sealing is covered by an ATHENA gasket. To be clear about what this page does not carry: no forged pistons, no forged rods and no ARP fasteners are listed for this block today, unlike the six-cylinder pages of the same range. If you are building a M60B40 and need a part that is not shown here, ask us and we will source it from our suppliers.
Parts for the S38B36, the 3.5 litre straight six of the first BMW M5 E34, built from 1988 to 1992. WISECO forged pistons run from 94 to 95mm at 8:1, 9.4:1 and 12:1, and the ZRP forged rods use an I-beam. This is also the only one of the two M5 pages to carry the head gasket: COMETIC MLS at 95.0mm in fifteen thicknesses from 0.76 to 3.56mm, or an ATHENA O-ring at 1.30mm. The head itself is shared with the 340hp car: SUPERTECH intake and exhaust valves, guides, 7mm stem seals and collets, with CATCAMS camshafts and cam followers.
Parts for the S38B38, the 3.8 litre straight six of the second BMW M5 E34, built from 1992 to 1995. Three items belong to this page alone. The ZRP forged rods use an H-beam, where the 315hp car takes an I-beam. The forged pistons come in two ranges, WISECO in 95 and 95.5mm from 8.5:1 to 12:1, and JE Pistons in 95mm at 8.5:1 and 10.5:1. And ARP head studs are listed here, not on the 3.5 litre page. Everything else is shared: CATCAMS camshafts and cam followers, SUPERTECH valves, guides, 7mm stem seals and collets.
ARP reinforced cylinder head studs for BMW E28/E34 M5 3.5/3.8
Set of 24 mechanical tappets for BMW M50 with and without VANOS.Brand: CATCAMS Engines: M50B20, M50B25, M50B20TU, M50B25TU Dimensions: outer Ø 35 mm, height 26.3 mm Lash caps: TS102 (7 mm stem) or TS101 (6 mm stem), sold separately
CATCAMS Sport camshafts for the BMW 4.0 32V M60B40 V8:BMW 540i E34 1992 - 1996CATCAMS part numbers 1303506, 1303507, 1303508, 1303509, 1303556, 1303557, 1303558, 1303559
CATCAMS Sport camshafts for the BMW 2.0/2.5 24V M50B20/B25 engine with VANOS (single VANOS on the intake):BMW 320 i E36 1992 - 1999 BMW 325 i E36 1992 - 1995 BMW 520 i E34 1992 - 1996 BMW 525 i E34 1992 - 1996CATCAMS references: 1303909, 1303910, 1303911, 1303912, 1303913, 1303956, 1303957
CATCAMS sport camshafts for BMW 3.6 / 3.8 24V S38B36 S38B38:BMW M5 E34 1988 - 1995CATCAMS references: 1301004, 1301008, 1301009, 1301010
CATCAMS Sport camshafts for BMW 2.0/2.5 24V M50B20/B25 without VANOS:BMW 320i E36 1991 - 1992 BMW 325i E36 1991 - 1992 BMW 520i E34 1990 - 1992 BMW 525i E34 1990 - 1992CATCAMS reference: 1301106, 1301107, 1301108, 1301109, 1301159, 1301160
Set of 6 forged 4340-steel connecting rods for BMW 6-cylinder, 135 mm c-to-c.Brands: ZRP Compatibility: 325i E30, 328i E36, 330i E46, M3 E36 US Engine codes: M20B25, M50B25 no VANOS, M52B28, M54B30, S50B30 US, S52B32 US Bolts: ARP 2000 or L19
Wiseco & Wiseco AP forged piston kit for BMW M20B25: bores 84-85 mm, RV 8.8 or 11.5-11.6:1, pin 22 mm, dome ⌀8.3 to +14.6 cc, rings included.
Wiseco AP Forged Pistons for M20 2.7L Stroker: Bore 84-85mm, RV 8.5 or 10:1, Pin 22mm, CH 31.2mm, Dome ⌀11.1/?1.6cc, Rings Included.
Forged pistons for BMW M50B25 no VANOS 2.5 24v: road/track reliability, segments included. Bore 84.0 mm, axle 22 mm, CH 32.55 mm. Compatible E34 525i/525ix and E36 325i/325is
Wiseco Forged Pistons for BMW M50B25TU (24V): Bore 84-84.5mm, RV 11:1 (NA) or 8.8:1 (Turbo), Shaft 22mm, CH 33.2mm, Dome ⌀1.5 to ⌀13.5cc, Rings Included.
BMW S38B36 3.6L forged pistons bores 94-95 mm, RV 8.0-12.2:1, axle 22 mm. Wiseco low, mid or high compression range. Specs tables, M5 E34 compatibility, OEM reference included.
BMW S38B38 3.8L forged pistons bores 95-95.5 mm, RV 8.5 ⌀12:1, 22mm axle. JE & Wiseco (low, OEM & high compression). Specs tables, M5 E34 compatibilities (sedan & Touring), OEM reference included.
High Impedance Fuel Injector FUEL INJECTOR CLINIC reference IS802 - FIC 1000cc BMW E36 M50/S50/S52 IS802-1000H.For fuel and ethanol systems in engine tuning: drift, rally, track and TrackDay.Same day dispatch Monday to Friday until 5pm. Europe stock: dispatched within 72h. GLS or Colissimo delivery in 24 to 48h.
High-quality Mechanical tappets BMW 540i E34 M60B40 (Mechanical tappets BMW 540i E34 M60B40) for reliable fitment and performance.
High-quality Mechanical tappets BMW M3 E36 M5 E34 S50B30 S38B36 S38B38 (Mechanical tappets BMW M3 E36 M5 E34 S50B30) for reliable fitment and performance.
Kit of 12 ARP2000 rod bolts replacing the original bolts on the OEM rods of BMW inline-six M50 / M50TU and M20B25 engines.Brand: ARP Engines: M20B25, M50B20 / M50B20TU, M50B25 / M50B25TU Dimensions: M9 x 53 mm Grade: ARP2000
Kit of 14 ARP2000 cylinder head studs for BMW 325i, 325iX, 525i and Z1 (M20B25).Brand: ARP Engines: M20B25 Thread: M10 x 1.5 Grade: ARP2000
Kit of 14 ARP2000 cylinder head studs for BMW M50 and S50/S52 US engines.Brand: ARP Engines: M50B20/TU, M50B25/TU, S50B30US, S52B32US Thread: M10 x 1.5 Grade: ARP2000
Kit of 14 ARP 8740 crankshaft main studs for BMW M50 and M52 engines.Brand: ARP Engines: M50B20/TU, M50B25/TU, M52B25, M52B28, S50B30US, S52B32US Thread: M10 x 1.5 Grade: 8740 steel
Reinforced head gasket Athena forBMW 4.0 32V M60B40 engine:BMW 540 JE-E34 1992 - 1996References: 330024R, 330025R
Reinforced Cometic head gasket, in MLS. Sold individually, one gasket per engine.Brand: CometicEngines: M20B20, M20B23Bore: 81 mmThicknesses: 0.69 to 3.56 mmReplaces: 11 12 1 722 728
Reinforced Athena (O-Ring) and Cometic (MLS) head gaskets. Sold individually, one gasket per engine.Brands: Athena, CometicEngines: M20B25, M20B27Bore: 85 to 86.5 mmThicknesses: 0.69 to 3.56 mmReplaces: 11 12 1 722 734
Reinforced Cometic head gasket, in MLS. Sold individually.Brand: CometicEngine: M50B20Bore: 82 mmThickness: 0.69 to 3.56 mmReplaces: 11 12 1 726 625
Reinforced Athena and Cometic head gasket, in O-Ring, MLS and MLX. Sold individually.Brands: Athena, Cometic Engines: M50B25, M50B25TU, M52B25, M52B28 excluding TU Bores: 84.5 to 87.5 mm Thicknesses: 0.69 to 3.61 mm Replaces: 11 12 1 726 619
Reinforced Athena and Cometic head gasket, in O-Ring and MLS. Sold individually.Brands: Athena, CometicEngines: M88B35, S38B35, S38B36, S38B38Bore: 95 to 95.6 mmThicknesses: 0.69 to 3.56 mmReplaces: 11 12 1 316 705, 11 12 1 401 351
High-quality Reinforced double valve springs BMW 540i E34 M60B40 (Reinforced double valve springs BMW 540i E34 M60B40) for reliable fitment and performance.
Kit 6 reinforced exhaust valves SUPERTECH for BMW 2.5 12V M20B25 engine:BMW 325i E30 1983 - 1993BMW 525i E34 1988 - 1990References: BMEVN-1084, BMEVI-1085.
Set of 12 reinforced exhaust valves SUPERTECH for BMW 3.6 / 3.8 24V S38B36 S38B38:BMW M5 E34 1988 - 1995References: BMEVN-1010, BMEVI-1006L, BMEVI-1010, BMEVN-1009, BMEVN-1009L, BMEVN-1010L
Set of 12 reinforced exhaust valves for BMW M50 VANOS, M52 and M54.Brands: SUPERTECH, FERREA Engines: M50B25TU, M52, M54, S50B30US, S52B32US Dimensions: 30.5 mm or 31.5 mm head, 6 mm stem Material: stainless steel or Inconel, 1 or 3 grooves
High-quality Interior springs Reinforced valves BMW 540i E34 M60B40 (Interior springs Reinforced valves BMW 540i E34 M60B40) for reliable fitment and performance.
Kit 6 reinforced intake valves SUPERTECH for BMW 2.5 12V M20B25 engine:BMW 325i E30 1983 - 1993BMW 525i E34 1988 - 1990References: BMIVN-1084, BMIVN-1085.Intake valves only; the reinforced exhaust valves are listed separately.
Set of 12 reinforced intake valves SUPERTECH for BMW 3.6 / 3.8 24V S38B36 S38B38:BMW M5 E34 1988 - 1995References: BMIVN-1010L, BMIVN-1006L, BMIVN-1008, BMIVN-1009, BMIVN-1009L, BMIVN-1010
Set of 12 reinforced intake valves for BMW M50 VANOS, M52 and M54.Brands: SUPERTECH, FERREA Engines: M50B25TU, M52, M54, S50B30US, S52B32US Dimensions: 33 mm or 34 mm head, 6 mm stem Material: stainless steel, 1 or 3 grooves
Kit of 24 reinforced valve springs for BMW M50 VANOS, M52 and M54.Brands: CATCAMS, SUPERTECH, FERREA Engines: M50TU, M52, M54, S50B30US, S52B32US Springs: single or dual Contents: springs, upper retainers, lower spring seats depending on kit
High-quality Reinforced Valve Springs BMW M5 E34 S38B36 S38B38 (Reinforced Valve Springs BMW M5 E34 S38B36 S38B38) for reliable fitment and performance.
Kit of 24 half-moon valve collets for SUPERTECH / FERREA valves, 7mm diameter:Number of grooves of your choiceReferences: KPR-VW7-T-24, KPR-VW7-S-24
Kit of 24 valve guides for BMW M50 VANOS, M52 and M54.Brand: SUPERTECH Engines: M50TU, M52, M54, S50B30US, S52B32US Material: manganese bronze, intake and exhaust Dimensions: OD 12.6 mm, ID 6.0 mm, length 43.3 mm
Set of 12 exhaust valve stem seals for BMW 24V six-cylinders.Brand: SUPERTECH Engines: M50TU, M52, M52TU, M54, S50B32, S54B32, S50B30US, S52B32US Material: Viton (FKM)
Set of 12 intake valve stem seals for BMW 24V six-cylinders and VAG 1.8T 20V.Brand: SUPERTECH BMW engines: M50TU, M52, M52TU, M54, S50B32, S54B32, S50B30US, S52B32US VAG engines: 1.8T 20V Material: Polyacrylate (ACM)
Set of 24 SUPERTECH valve guides for BMW 3.6 / 3.8 24V S38B36 S38B38:BMW M5 E34 1988 - 1995Reference: GDE-BMS14-7
Tri-metal main bearings ACL RACE / KING RACING for BMW M20B25, M50B20/B25, M52B25/B28, M54B25/B30, S50B30/B32, S54B32:BMW 325i E30 1983-1993 BMW 320i 323i 325i M3 E36 1991-2000 BMW 323i 325i 330i M3 E46 1998-2006 BMW 520i 525i E34 1988-1996 BMW 523i 525i 530i E39 1996-2004 BMW 525i 530i E60 2001-2010 BMW Z3 Z4 2.0 3.0 Z3M Z4M E36 E85 1999-2008
Set of 12 trimetal connecting rod half-bearings for BMW inline-six M20, M50, M52 and M54.Brands and treatments: ACL Race and King Racing (optional pMaxKote coating) Compatibility: E30, E34, E36, E39, E46, E60, Z3, Z4 Engine codes: M20, M50, M52, M54, S50B30US, S52B32US Available sizes: standard to +0.50 mm, increased-clearance versions (HX / STDX)
Set of 8 trimetal connecting rod half-bearings for BMW inline-four M40, M42, M43 and M44.Brands and treatments: ACL Race and King Racing Compatibility: E30, E34, E36, E46, Z3 Engine codes: M40B16, M40B18, M42B18, M43B16, M43B18, M43B19, M44B19 Available sizes: standard to +0.50 mm, increased-clearance version (HX)
Kit of 48 valve collets for SUPERTECH / FERREA valves, 7mm diameter: Number of grooves of your choice
kit of 48 half-moon/valve keys for SUPERTECH 6mm diameter: Number of grooves of your choice
Set of 12 SUPERTECH exhaust valve stem seals for BMW 3.0 / 3.6 / 3.8 24V S50B30 S38B36 S38B38:BMW M3 E36 1992 - 1995 BMW M5 E34 1988 - 1995Reference: VS-VW7E
Set of 12 SUPERTECH intake valve stem seals for BMW 3.0 / 3.6 / 3.8 24V S50B30 S38B36 S38B38:BMW M3 E36 1992 - 1995 BMW M5 E34 1988 - 1995Reference: VS-VW7I
KENT CAMS vernier cam pulley for BMW M20B25 2.5 12V engine:BMW 325 i E30 1983 - 1993 BMW 525 i E34 1988 - 1990
Vernier cam pulleys CATCAMS / KENT CAMS for the BMW 2.5 12V M20B25 engine:BMW 325 i E30 1983 - 1993 BMW 525 i E34 1988 - 1990
This page gathers the uprated engine parts for the BMW 5 Series E34 and the M5 E34, sorted by engine code: M20B25, M50B20 and M50B25 with or without VANOS, M60B40 of the 540i, S38B36 and S38B38 of the M5.
It covers forged pistons and forged connecting rods, tri-metal big end and main bearings, CATCAMS camshafts and mechanical cam followers, vernier cam pulleys, performance intake and exhaust valves with SUPERTECH guides, springs, collets and stem seals, reinforced head gaskets, ARP head studs, main studs and rod bolts, and high flow injectors.
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