We believe that there's no such thing as over intercooling an engine. Whenver possible, fit the largest intercooler you can. We also believe strictly in front-mounting because air-to-air intercoolers must be in the path of ambient air flow. Top mounted and under-hood air-to-air intercoolers are useless, especially on street-cars where heat-soak can cause intercoolers to actually absorb heat. We've had far too many customers that have destroyed their engines because of heat soak with a top mounted intercooler. A longer charge air path does not always increase turbo-lag, despite popular belief. Often times, the smaller, more restrictive top mounted or side mounted intercoolers are so restrictive that turbo-lag can actually decrease with using a properly designed front mounted intercooler system.
"When boosting engines up to 45psi, keeping the intake charge as cool as possible requires and intercooler that provides both low pressure drop as well as an extremely high rate of heat rejection. We've found XS Engineering's PowerI/C intercooler cores to be the best!"

-Javier Gutierrez, President, JG Engine Dynamics.