Just wondering what the differences between the US motor and the JDM motors are? Internally and exterior wise.

 

Forgot to specify....13bt engine. s4 or s5 info, dont matter to me but both would be great.

 

there was a thread started today with the same topic. so for i've nothing a different intercooler, 2 tps', and a different oil pan.... Edit. S4 and S5..... S5 has bigger turbo, lighter rotors, and higher compression. I believe the intake manifold is different to

 

^ you are referring to series changes but not JDM to USDM. JDM S4 didnt have EGR valve the intercooler has different writing on it and the fuel rail FPR is on opposite rails. Umm yeah thats all I can think of oh yeah JDM down pipe did not have the pre cats in it.

 

Sorry to revive this old thread of mine.

Im about to make a purchase on a 90 n/a to t2 conversion. Need to know more comparisons, that's if there is any more. Reason why I wanna know so badly is in case of a situation in which I buy a mod and it doesnt fit. ETC ETC.