A guy I know that used to have 4th gen was telling me about a company called granatelli that sells MAF sensor for cold air systems that is supposed to give something like 25 hp. I looked it up and the company does claim it will gain up to 25, dyno proven. Anyone heard of this?

 

Granatelli parts are expensive and are not worth buying IMO. Spend your money on better mods.

 

So is there anywhere that sells the same part, or is it a sham?

 

Unless you engine is pushing over 400HP the stock MAF is large enough, and a larger MAF will show little if no improvements.

 

^^^ like pete is sayin, unless the motor is built you would be better off usin the bucks elsewhere.