The Turblown EngineeringRotary Engine Stud Kit is designed for High Horsepower applications. These studs are available for all 13B engines including the MSP-13B Rx-8 engine, 13REW, 13RE, 13B, & 13BT. This stud kit is a more linear, and precise medium of torquing the engine compared to stock tension bolts. Torquing the stock bolts creates friction at both the threads, and head of the bolt. This unnecessary friction promotes false torque readings and the result is reduced and uneven clamping force. Instead of twisting a bolt to achieve a desired torque reading, studs are stretched in a static position. Furthermore and more importantly these studs are made from far superior material & manufacturing process which increases clamping force evenly, and limits engine expansion. The OEM bolt material stretches under high boost and in turn, reduces clamping force. An engine using the OEM bolts will expand several thousands, as measured with a strain gauge on an engine dyno. This expansion can damage to the engine's internals. Common harmonic, and resonance issues are reduced due to the superior material used in the stud manufacturing. Installing these studs will reduce engine expansion and movement which is a must for a high powered rotary. 

Turblown Engineering has been manufacturing these studs since 2006. These studs are precision ground from aircraft quality forged steel. The threads are hot rolled, not just cut with a die or a lathe. The course end is embossed with a allen head for easier installation. They are rated at 195000 PSI tensile strength after the heat treating process. One can torque these much higher than the OEM bolts without any breakage( maximum of 77 ft lbs for studs, please be aware front iron might break near this limit). The studs are finished in a black oxidation coating. No machining is required for installation.