Do anyone knows if I can use a 98 Type R 4 into 1 header with my B20Vtec swap ... I'm running a B16 head...

 

Yes you can, but if you already have exaust on your car your either going to have to modify what you have or get some custom piping. The type R collector is larger than regular b-series headers.

 

lol... the exhaust on the car is jacked up soo I'm planning on making a new one with a high flow cat, test pipe ( to drop all resonators and cat), moroso spiral max muffler as a resonator, mini straight muffler ( as a resonator) and a es tuning muffler...

Only thing is es tuning mufflers are suppose to be back order