Exhaust w/o Dp

dsipple92

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Anyone upgrade their exhaust without doing a downpipe? Wanna make it a little louder but not mess with emissions system.

any sound clips of just exhausts W/o dp would be great too!!!




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kurumi

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Just get a catted downpipe if you're worry about emissions. I have that and I don't feel like I need an exhaust for more noise.
 
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dsipple92

dsipple92

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That is not 50 state legal which messes with the emissions system.
 

Munkeeboi

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BananaBandolero

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That is not 50 state legal which messes with the emissions system.
Agree, in California you just can't touch the downpipe. Tried to get a modified car through that process once,
no dice, not even close!

Edit: Read the wrong location, thought you were in CA. In Texas I think you get by with a good quality catted downpipe...

Most exhaust videos on manufacturer's or store's pages will be with the stock downpipe unless they say otherwise, so that's a decent source. If it sounds like a truck at idle then probably the downpipe has been changed.

HKS is a popular one, this I'm pretty sure is without downpipe:
 

Snorlax27

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Has anyone tried passing emissions with a catted downpipe before? This has always been on my mind.

I’d assume if the cats burn clean and the tech wasn’t looking for an aftermarket Downpipe, it’d be possible :dunno:
 

kurumi

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Has anyone tried passing emissions with a catted downpipe before? This has always been on my mind.

I’d assume if the cats burn clean and the tech wasn’t looking for an aftermarket Downpipe, it’d be possible :dunno:
I’ve passed without any issues here in Northern Virginia with a catted downpipe on all my cars to date. California is obviously a no go on anything emissions related.
 

Snorlax27

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I’ve passed without any issues here in Northern Virginia with a catted downpipe on all my cars to date. California is obviously a no go on anything emissions related.
Yea I’m in California. I’m wondering if most smog spots are competent enough to tell the difference between a stock down pipe and an aftermarket. Unless they have a lift or inspect it closely from the top, I’d say there’s a slight chance of passing visual.

It’s the visual part I’m worried about more so than the emissions, especially if E85 burns cleaner. Gotta love California :banghead:
 

MYNEWFAST

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Starting January 1, 2019, if your vehicle is less than 4 model years old, you can pay a smog abatement fee instead of getting a smog inspection for the first 8 years that your vehicle is registered.

This is not a NEW Law. New owners do not have to smog their vehicles until 6-8 years.
Diesel vehicles are Still every 2 years.
 

Ultimateone

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Youtube has a million exhaust videos and of course a ton of people have added catbacks.
 

Bflood

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Swapping downpipes is quite easy.. Just toss on the factory pipe right before you get smogged.
 

Snorlax27

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I know new cars are exempt from smog for a couple of years, that’s a given. I am curious to see how California Supra owners go about SMOG when the time comes. Installing a down pipe is not rocket science, but more of a pain in the ass and an inconvenience to swap in and out. There’s also “hot smogs” but I’d rather do things legit.

Since Supras aren’t exactly Civics or Corollas on the street, I wonder if techs see enough of these to tell the difference between stock and aftermarket pipes.
 

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