I'd like to mod my exhaust, but it must be legal - ZR-1 Net Registry Forums

MuRCieLaGo · 11-11-2015

Hi,

I'm pretty much an expert regarding the road laws where I live, especially regarding exhaust systems.

1. We do not have emission tests, never.
2. Our primary concern is the noise, it is measured by the police officer's ear only (sonometer has no value in court).
3. Police officer usually goes under the car to take some pictures of the modified exhaust system, if he suspects it is too loud. I don't think he'll be able to do that with my ZR-1 (too low and he is not allowed to use a jack).
4. I live in a 50,000 people city, nearest ZR-1 except mine is 200 miles away. So the police officers have no idea how loud a ZR-1 should sound.

Rule #1: I don't want to be harassed by police officers.
Rule #2: I want to mod my exhaust performance-wise.
Rule #3: A bit louder than OEM should be OK, they don't know the OEM sound of a ZR-1.

Project:

I want to install headers and I want to empty the catalytic converters.

Do you think it will much more noisy doing that?

I would like to simply install a full exhaust system, but I can't because it is much louder for sure (and it would have that aftermarket look). If you know an exhaust system that is as loud as the OEM (or less), everything would be fine buying it. But I don't think it exists.

Sorry about all the threads I've been posting lately, I just have too much free time now and I'd like to work as much as I can on the car.

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11-11-2015	#1
MuRCieLaGo Join Date: Aug 2014 Location: Trois-Rivieres (QC) Posts: 473	I'd like to mod my exhaust, but it must be legal Hi, I'm pretty much an expert regarding the road laws where I live, especially regarding exhaust systems. 1. We do not have emission tests, never. 2. Our primary concern is the noise, it is measured by the police officer's ear only (sonometer has no value in court). 3. Police officer usually goes under the car to take some pictures of the modified exhaust system, if he suspects it is too loud. I don't think he'll be able to do that with my ZR-1 (too low and he is not allowed to use a jack). 4. I live in a 50,000 people city, nearest ZR-1 except mine is 200 miles away. So the police officers have no idea how loud a ZR-1 should sound. Rule #1: I don't want to be harassed by police officers. Rule #2: I want to mod my exhaust performance-wise. Rule #3: A bit louder than OEM should be OK, they don't know the OEM sound of a ZR-1. Project: I want to install headers and I want to empty the catalytic converters. Do you think it will much more noisy doing that? I would like to simply install a full exhaust system, but I can't because it is much louder for sure (and it would have that aftermarket look). If you know an exhaust system that is as loud as the OEM (or less), everything would be fine buying it. But I don't think it exists. Sorry about all the threads I've been posting lately, I just have too much free time now and I'd like to work as much as I can on the car.