What diameter are the hardpipes on used on the intakes? Also who makes them, and what are they made of, stainless or aluminum? Any installed pics would be appreciated especially close-ups on the front turbo.

Thanks.

 

If you are talking hard pipe kits for the stock box and intakes that use the stock pipeing then it's 2.5. M2 and Rx-7 Fashion sell them. Just go to the sites and the rest of your questions should be answered.