Arlows 6x Steel Connecting Rod 142,5mm BMW E34 M5 3,8L S38 ( H-Beam )

  Audi Con-Rod Set

Fitting at following BMW engines:

- BMW E30 M3

This highquality con-rods are made of 4340 steel (40CrNiMoA).

The H-shank enables maximum stability during minimum weight.

Thereby they're perfectly suited for high-engine-speeds.

At first this con-rods got many times hardened to achieve an durability of HRC35-38.

Finally they got shot-blasted to strenghen the surface density to the maximum.

Before all of our con-rods are 3D designed and finally CNC-milled, it's possible to simulate a lot of charge states and tensions.

The small-end-bearing is made of bronze, and is suited with an lubrication bore.

All our connecting rods are equipped with high-strength Pro-Series 14.9 screws ! These have a tensile strength of 1490N/mm^2. Furthermore, the threads are rolled which also increases the flank thickness by 30%.

Allowance:

Piston pin bore: +-4/1000mm
Crank pin bore: +-4/1000mm
Verticality, paralellism und deformation:  +-5/1000mm
Weight: +-1 Gramm

Technical specifications:

Material: 4340 Stahl (40CrNiMoA)
Tenacity: >1250N/mm²

Length: 144mm
Piston pin bore: 22mm
Upper width: 23,80mm
Crank pin bore: 52mm
Lower width: 23,80mm
Weight incl. screws: 554 Gramm
(Original: 677 Gramm)

Employment:

- approved for up to 9000upm 

- approved for up to 200hp per con-rod