Originally Posted by 32krazy!
ok 3.5 to the t/b but necked down. im still not seeing how this improves flow over a full 3" system. in theory you could do the same and have a 5" system but the flow still wont be any more then the smallest opening correct?
I can't believe this still gets argued about. The NW's DCAI is like 6" of air flow and necked down at the TB, but the dyno tests have proven the gains. Many of us have run both and know the difference. Most notably low end gains, both torque and H.P. I commend Tuna for his awesome build and with all his mods and attention to detail, it will be both a cool and formidable contender for certain.