BMW N54 Engine Pro-Series 18.8 Cylinder Head Stud Set
Replacing the original cylinder head screws with high-strength Pro-Series 18.8 studs.
This is necessary when making large increases in performance, as the original cylinder head screws elongate during operation and the cylinder head can lift off.
The Pro-Series 18.8 stud bolts with a tensile strength of 1850 N / mm² provide a solution to this.
In addition, these stud bolts do not have to be replaced after dismantling, but can be reused.
Manufacturer part number: P102051410
Kit content: 4 stud bolt (M9) / 10 stud bolt (M11) / 4 nuts (M9) / 10 nuts (M11) /14 washers / assembly paste / assembly instructions
Tensile strength: PS 18.8 steel / 1850+ N/mm² (270.000+PSI)
The Pro-Series 18.8 sets are high-strength stud bolts manufactured in Germany.
A special steel is used which, after tempering, has a tensile strength of 1850 + N / mm².
All threads are formed and not cut as usual. The so-called rolling of threads can increase the strength of the tooth flanks by around 30%. All Pro-Series products are supplied with a nickel coating or optional with a burnished protecting against corrosion in the long term, even under the toughest conditions. Pro-Series stud bolts have a hexagon socket drive on the head side for screwing in the stud bolts. Due to a cone on the engine block side of the bolt, these are not supported on the thread flanks when the nuts are tightened, but in the bore of the thread in the engine block. This support protects the threads when racing engines are frequently rebuilt.
Pro-Series advantage over other manufacturers is the nuts and washers included in the set, these also have a tensile strength of 1850 N / mm².
From MY 2006 - 2012
335i E90/E91 Limousine/Kombi 306PS
335i E92 Coupé 306PS
335is E92 Coupé 326PS
335i E93 Cabrio 306PS
535i E60/E61 Limousine/Kombi (USA) 306PS
135i E82/E88 Coupé/Cabrio 306PS
135i E82/E88 Coupé/Cabrio 326PS
X6 35i E71 306PS
X6 35i E71 326PS
Z4 35i E89 306PS
Z4 35is E89 340PS
740i F01/F02/F03/F04 326PS
1er M E82 Coupé 340PS
Alpina B3 BiTurbo 360PS
Alpina B3S BiTurbo 400PS