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Home : Mazda RX-7 : Engine Internals :

13B Engine Stud Kit

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Price: $450.00

In stock: yes

We now have 56 engines worth in stock. After 10 years of manufacturing we have done a major overhaul on the studs, including a lot of R&D testing. This never before seen data will be released when the studs are in stock. Read more on our blog about these studs; Turblown Engineering stud kit for your 13B Rotary Engine. Our stud kit is a more linear, and precise medium of torquing the engine compared to stock tension bolts. Torquing the stock bolts create undue friction at both the threads, and head of the bolt. This unnecessary friction promotes false torque readings and the end result is reduced and uneven clamping force. Instead of twisting a bolt to achieve a desired torque reading, our studs are stretched in a static position. Furthermore and more importantly our studs are made from far superior material which increases clamping force evenly, with the same amount of applied torque compared to the OEM bolts. Stud expansion is limited while the inferior OEM bolt material allows stretching which in turn, reduces clamping force. Common acoustic, 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. Our stud kits also feature an embossed allen head which makes assembly very easy.

  • Price includes freight to the lower 48 states
  • Studs are ground from aircraft quality forged steel.
  • These studs feature hot rolled threads and allen head tips.
  • Rated at 195000 PSI tensile strength after heat treating.
  • No machining is required for installation.
  • Studs are compatible with OEM or aftermarket flywheels.
  • Our kit replaces all 16 inner tension bolts.
  • Studs should be torqued to 3 inch lbs, and the nuts to 32 Ft lbs. Lubricate the front iron threads, and use a silicone sealant near the OEM sealing washer threads

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