There is indeed a drastic difference between intercoolers, and making them is a complex and difficult process. A lot of the eBay intercoolers use a ton of metal to make up for less bending and welding, and as a result they don't shed heat as well once heatsoaked. You also want very efficient internal routing, or you are creating internal backpressure between the turbo and the intercooler. A competent fabricator can create a functional intercooler, but a truly great intercooler comes from research, development and testing as well as excellent fabrication. Considering how crucial an intercooler is to the health and longevity of a boosted engine, it seems a poor place to cut dollars and cents. Both shops I have worked with in tuning my WRX will only install APS or Perrin TMICs. They could add a much bigger markup (and thus make more $$) to the cheapo eBay parts, but instead they go with the race-tested components; wonder why that might be?

 

Thats what I meant, methanol not methane. Sorry.

 

hey i am selling a 20g/FP green if you want it