Has anyone heard of/installed/got any opinions on the Gruppe M Filter Ram Charger for the FD3S ? All I know is it\'s a Carbon Fibre box and K&N-style air filter which they claim gives 12-15BHP uplift on stock.
Looks blinkin\' expensive, but apparently is excellent quality.
I\'ve seen pics of BMW versions, but nothing on the RX7.
Any info most appreciated !
From what I have seen they seem to work well on Civic Type R\'s, but boy are they expensive!
Lee
Yep - I had one on my Civic Type R. Quality piece of kit, though it will only work with the stock intercooler on the FD.