Car: 2007 FN2 GT
Join Date: 24th March 2010
Thanked 1,943 Times in 1,635 Posts
Tegiwa is the best closed box system for the money, the other being the Mugen as you say
Otherwise CPL, SKunk2 and HKS are the other options.
Filter choice is paramount with the box systems. KnN and OEM Honda are best. Most others drop MAP pressure and so horsepower.
A closed box system will see a few HP with a proper map via Flashpro but an exhaust manifold will transform the mid range- maybe worth a thought as it does soon build cost with multiple remaps
Where you from fella?