you can also use a length of heater hose to attach the air tube to the new pipe.
Good luck man, I can't help ya with the O2 sensors, but Mine leaked too, took a little work to get it perfect!
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Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing!
Click here! Or my website:
www.joe4speed.com
99 Ninja ZX-6R:10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph