i just got my swap put in 2 days ago. i have a b16head on gsr block. the thing is i am using my stock piping and muffler. so my pipe is rattling and you can hear the leaks. i am also obd2 gsr ecu still. make much of a diff using a b16 ecu? how much of a difference do you think when i finished my custom piping (2.25) and convert to obd1? thanks

 

Should be a noticeable difference. I ran a D16z6 with CX piping and when I installed bigger piping I felt the difference. Also, if you have a b16 head you should use a B16 ECU. Vtec is too low on a GSR ECU. OHHHH BTW, OBDII just sucks..