kooks

[crazy dave ls1]

ordering my new headers in a few days,but i have a few questions.can a tuner fix my obd monitors to not set a check engine light if i delete the cats and AIR.if they can by will it show ready status to pass emissions testing?is there really that much benefit or should i just install the headers and leave well enough alone?any help would be greatly appreciated.

[Mr. Luos]

AIR is just in the way.

But yes, your tuner can delete those codes.

[crazy dave ls1]

1 3/4 vs. 1 7/8 primaries is bigger getter?

[tonyjnjz]

the larger primarys u run the more tq u will lose unless your motor is flowing enough air to support.......if your basicly stock stick with 1 3/4ths .....i belive larger primarys will gain u a few hp way up top but youll lose some down low as well as a lil tq all the way thru.......somone will correct me if im wrong......im going to run 17/8ths when i get long tubes....my motor is stroked though