Intentional gap in exhaust pipe

[Leonardo]

Originally Posted by FX86

hey guys how can i fit P295/30R18 tires in the front and P355/30R19 tires in the rear on a stock fr-s?

It is possible, but is going to look something like this... Forget turning too, straight line only!

via Imgflip Meme Generator

[FX86]

Originally Posted by Leonardo

It is possible, but is going to look something like this... Forget turning too.

via Imgflip Meme Generator

oil changes would be a lot easier tho

[strat61caster]

Originally Posted by jasonojordan

Not to mention it would be considered illegal in California.

Why?

As long as you meet sound requirements and aren't pumping exhaust into the cabin there's nothing illegal about modifying the catback.

[jasonojordan]

Originally Posted by strat61caster

Why?

As long as you meet sound requirements and aren't pumping exhaust into the cabin there's nothing illegal about modifying the catback.

At that point you are not modifying the cat back you are completely removing it. I'm no expert in California emissions laws but I'm fairly certain they will not let you run a straight pipe from the cats back and it pass inspection.

[jasonojordan]

Originally Posted by strat61caster

Why?

As long as you meet sound requirements and aren't pumping exhaust into the cabin there's nothing illegal about modifying the catback.

CA. V.C. 27151 No person shall modify the exhaust system of a motor vehicle in a manner which will amplify or increase the noise emitted by the motor of such vehicle so that the vehicle is not in compliance with the provisions of Section 27150 or exceeds the noise limits established for the type of vehicle in Article 2.5(commencing with Section 27200) of this chapter. No person shall operate a motor vehicle with an exhaust system so modified.

This shows that there are other characteristics that the exhaust system must conform to truly show a violation. This also shows that other vehicle codes must be considered when in violation of this vehicle code.

CA. V.C. 27150 (a) Every motor vehicle subject to registration shall be equipped with an adequate muffler in constant operation and properly maintained to prevent any excessive or unusual noise, and no muffler or exhaust system shall be equipped with a cutout, bypass, or similar device.


(b) Except as provided in Division 16.5 (commencing with Section 38000) with respect to off-highway motor vehicles subject to identification, every passenger vehicle operated off the highways shall at all times be equipped with an adequate muffler in constant operation and proper maintained so as to meet the requirements of Article 2.5 (commencing with Section 27200), and no muffler or exhaust system shall be equipped with a cutout, bypass, or similar device. (c) The provision of subdivision (b) shall not be applicable to passenger vehicles being operated off the highways in an organized racing or competitive event conducted under the auspices of a recognized sanctioning body or by permit issued by the local governmental authority having jurisdiction.




Part (a) states that the muffler must suppress any excessive or unusual noise. This refers to part (b) which states that the muffler must meet the requirements of Article 2.5, which refers to noise levels. Part (a) and (b) also refer to a cut-away, bypass or similar device commonly known as a "dump."

[strat61caster]

Originally Posted by jasonojordan

At that point you are not modifying the cat back you are completely removing it. I'm no expert in California emissions laws but I'm fairly certain they will not let you run a straight pipe from the cats back and it pass inspection.

The only purpose the exhaust serves after the catalytic converts is to direct exhaust gases away from the cabin of the vehicle and to reduce sound to reasonable levels.

The Fiat Abarth is running a straight pipe from the factory post-cat.
One of the family cars is running a straight pipe post cat as well, family member worked for the BAR smog department, shouldn't be any issues.

Here's a summary of the vehicle code if you feel so inclined to think I am incorrect:
http://www.bobsmuffler.com/noise.htm

[jasonojordan]

Originally Posted by strat61caster

The only purpose the exhaust serves after the catalytic converts is to direct exhaust gases away from the cabin of the vehicle and to reduce sound to reasonable levels.

The Fiat Abarth is running a straight pipe from the factory post-cat.
One of the family cars is running a straight pipe post cat as well, family member worked for the BAR smog department, shouldn't be any issues.

Here's a summary of the vehicle code if you feel so inclined to think I am incorrect:
http://www.bobsmuffler.com/noise.htm

I copied my info from the link you had posted lol. Seems like it would be to the discretion of the officer involved as the car does not come that way from the manufacture then it would be interpreted as "modified" and fall under the segment that I copied and pasted.

[strat61caster]

Originally Posted by jasonojordan

I copied my info from the link you had posted lol. Seems like it would be to the discretion of the officer involved as the car does not come that way from the manufacture then it would be interpreted as "modified" and fall under the segment that I copied and pasted.

Which subjects the vehicle to a noise measurement, nothing more.

[Shark_Bait88]

I honestly can't even think of what the exhaust would sound like with that weird gap, because I can't imagine why anyone would do that. If you want it to be louder for cheap, just get a muffler delete.

Also, I'd stop going to that dealership for service if they're employing mechanics who would suggest that.

[Tcoat]

Originally Posted by Shark_Bait88

I honestly can't even think of what the exhaust would sound like with that weird gap, because I can't imagine why anyone would do that. If you want it to be louder for cheap, just get a muffler delete.

Also, I'd stop going to that dealership for service if they're employing mechanics who would suggest that.

Never done it on purpose nor had it happen to a boxer engine but generally when my cars had the pipe rot off before the muffler and leave a gap like that the sound was sort of like
BRRRAAAAAPPPPPP
POP
POP
POP
POP
BRRRRRRAAAAAAAPPPPPPP

[Shark_Bait88]

Originally Posted by Tcoat

Never done it on purpose nor had it happen to a boxer engine but generally when my cars had the pipe rot off before the muffler and leave a gap like that the sound was sort of like
BRRRAAAAAPPPPPP
POP
POP
POP
POP
BRRRRRRAAAAAAAPPPPPPP

Yeah, I kinda guessed it'd just sound like a car with a hole in the exhaust. Which sounds terrible.

[D_Thissen]

Don't let that 'mechanic' touch your car.

[guybo]

Just drop the muffler. It's free and sounds better than the washer mod

[IceFyre13th]