Longtubes,and 02 sensors

[mr33406]

I have a 99 Z28,I have added Pacesetter Long tube headers,And the off road Y pipe(no cats).I went to Diablo sport in boca fl,and did a dyno tune.He turned off all the o2 related sensors.I keep having trouble when it rains hard or if it gets wet under the plugs.The car will run fine,and then it will shake and not run right for a week or so,Till it drys out.I know longtubes are a problem.Any one know any tricks or aftermarket parts to fix this problem??? Thanks

[King James]

Ditch the o2 extensions and buy Corvette o2's. They have a longer harness so there is no need for the extensions. Or have your tuner do a speed density tune on your car and completely eliminate the o2's and MAF.