Nismo intake gains
Originally Posted by BewstAdd1ct
jeff, dont argue semantics, youll make me think you dont have a sound argument 
Originally Posted by BewstAdd1ct
so umm... what emissions stuff can you remove that will add more HP?
Originally Posted by Puppetmaster
I think some states (including VA) already have sniffers, but as long as you retain your main cat and ensure that it is fully warmed up before inspection you will pass emissions. The pre-cats have almost no effect on what the sniffer picks up once the main cat is fully warmed up and operational. I don't have headers yet, but I know people with headers or y-pipes who have removed the precats while retaining the main cat have yet to face any issues with inspections. Its only when you have visual inspections that this will be an issue.
Btw, in my experience, when people (myself included) experience exhaust fitment issues there is usually added vibration and rattling because of the extra tension. Not sure if that's what happened to you, but sorry for assuming that. You said it made your engine less smooth and I attributed it to that. Anyways, I agree that a y-pipe on a VQ35 does help a little on the higher end, according to a dyno I've seen and my butt-dyno, and for those of us who can't/won't put in headers that's gonna have to do for now.
Btw, in my experience, when people (myself included) experience exhaust fitment issues there is usually added vibration and rattling because of the extra tension. Not sure if that's what happened to you, but sorry for assuming that. You said it made your engine less smooth and I attributed it to that. Anyways, I agree that a y-pipe on a VQ35 does help a little on the higher end, according to a dyno I've seen and my butt-dyno, and for those of us who can't/won't put in headers that's gonna have to do for now.
I just got my VA emissions inspection a couple weeks ago. The shop had a big high-tech computer setup on a rolling stand with a barcode scanner gun or something like that. He zapped one of the info plates on the car (for VIN, perhaps), then plugged in to the car's computer (where you'd plug in an OBD or consult)....turned car on for a minute or two...turned it off.
said "looks good, you pass." and handed me a printout with PASS next to each box (CELs, CO2, etc etc)
I asked him "don't you do the sniffer in the exhaust pipe anymore?" and he said "no, basically if your car's computer says everything is ok, you're good to go." Keep in mind this was before my ypipe was on, but I doubt it would have made a difference.
He said the results are instantly transferred online to DMV so you can renew your registration immediately
by the way, i hear texas is about to completely do away with emissions and safety inspections altogether....
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