Head Stud Set burnished for Porsche 991 Turbo

Porsche 991 Turbo Pro-Series 18.8 cylinder head stud bolt set

This set replaces the original cylinder head bolts with high-strength Pro-Series 18.8 stud bolts. This is necessary for significant performance increases, as the original cylinder head bolts can 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 remedy here. In addition, these stud bolts do not need to be replaced after disassembly, but can be reused.

Technical data:
Part number: P117011610.BR
Contents of the kit:
16 stud bolts (M12)
16 nuts (M12)
16 washers
Lubricant for assembly
Assembly instructions

Tensile strength:
PS 18.8 steel
1850+ N/mm² (270,000+ PSI)

High-quality materials and production
The Pro-Series 18.8 sets are high-strength stud bolts made in Germany. A special steel is used which has a tensile strength of 1850+ N/mm² after tempering. All threads are formed and not cut, as is customary in the trade. By rolling the threads, the strength of the tooth flanks can be increased by approx. 30%. All products in the Pro series are supplied with a nickel coating or optionally with a black oxide coating and are therefore protected against corrosion in the long term, even under the toughest conditions.

Easy installation and durability
The stud bolts in the Pro series have a hexagon socket drive on the head side for screwing in the stud bolts. Thanks to a cone on the motor block side of the stud bolt, these are not supported on the thread flanks when the nuts are tightened, but in the bore of the thread in the motor block. This support protects the threads during the frequent assembly of racing engines. A major advantage of the Pro-Series over other manufacturers are the nuts and, if necessary, washers included in the set, as these also have a tensile strength of 1850 N/mm².

Made in Germany