A)Material 
Alloy Steel AISI4340(40CrNiMoA) 

B)Car Type 
1) Americian Cars: Ford,Chevy,Chrysler
2)Europe Cars:Honda,Audi,BMW,Peugeot,Volov,Alfa Romeo,Opel/Vauxhall
3)Japan Cars:VW,Mitsubishi,Nissan,Toyota,Subaru,Mazda
4)Motorcycle-others:Yamaha,Suzuki,Kawasaki,Honda,KTM 

C)Product Description 
Machining Tolerance:
A.Big End Tolerance:+/-0.00017"
B.Small End Tolerance:+/-0.00017"
C.Verticality,Parallelism and Distortion:+/-0.00018"
D.Center to Center Distance Tolerance:+/-0.001"
E.Verticality and Parallelism Tolerance between Two Bolt Holes:0.0004"
F.Return Tolerance of Big Hole Repeat Assemble:0.00018"