i have a cx racing fmic and its not a poor product by any means, the core is good to 450HP and it took no special modification to fit, it actually bolts up very nicely and all the parts were good quality with nice welds, i had it powder coated white and it still performs amazing! a buddy of mine is pushing around 380whp with a BNR and has cx fmic and does perfect on his as well, honestly people will dogg it all day long but its the best buy on the market and works just as good as all my buddies COBB's!! do what youd like but you cant deny the numbers, i have all high priced parts on my car except for fmic and im perfectly ok with it since its a great product!