I am putting a inner cooler on my truck seeing as i have the motor out.and the whole front end off so why not i have piping and cooler. I also have a spyder of a 2001, i am seeing.every where i need one of a e99, why will the 2001 one not work?

 

Because the OBS and E99 plenums are 2.5in and the SD is 3in

 

So if i have a set of 3 inch plenums then i can put those on and run the 2001?

 

Maybe? I'm not sure if the SD spider would mate up to the OBS turbo