An R302 has 4 bolt mains ( middle 3 anyway) and they are 1/2" bolts. A4 is only 7/16" I think. Not sure about the A4 but R302 also has 1/2" head studs. They no longer make the A4 you can only buy the R302 now.
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93 LX
R331/AFR 205/Vic 5.0/? psi
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