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Author Topic: Exhaust/Car classification  (Read 2157 times)

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Midnightsky

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Exhaust/Car classification
« on: April 29, 2017, 04:40:36 PM »
Quick question about exhaust and car classification rules. The car Im taking delivery of in a week or two comes with a "dual" exhaust, not a true dual.  Regardless of looks, Id like to skip the dual exhaust and swap for a single axle-back exhaust, 4 cyl motor so dual is unnecessary.  Because its all going to be axle-back modifications and essentially would not gain me anything performance wise, would I be able to retain stock class status? Technically there is the possibility of minor weight savings by not retaining the dual setup but wouldn't that be true of any aftermarket/custom catback or axle-back exhaust swap? Seems like a minor issue and not very likely that anyone locally would protest but I could see the possibility of protest if I decided to enter a national event if there was anything within the rules that prevents me from changing from dual to single.
2022 Subaru BRZ 2.4L WRB Betty
2017 Mazda 3 Hatch 2.5L SOLD

Apex Carver

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Re: Exhaust/Car classification
« Reply #1 on: April 29, 2017, 08:06:44 PM »
Is it downstream of the cats? if so you should be good to go
Chris S. #86

Midnightsky

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Re: Exhaust/Car classification
« Reply #2 on: April 29, 2017, 08:46:07 PM »
Is it downstream of the cats? if so you should be good to go

yea its downstream, from rear axle to the bumper. Just that short section is all im going to change as its cheap and provides a bit of extra exhaust tone.
2022 Subaru BRZ 2.4L WRB Betty
2017 Mazda 3 Hatch 2.5L SOLD

Robp201

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Re: Exhaust/Car classification
« Reply #3 on: April 29, 2017, 08:49:31 PM »
Looks good according to rules in street.

Midnightsky

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Re: Exhaust/Car classification
« Reply #4 on: April 29, 2017, 10:54:41 PM »
Looks good according to rules in street.

wicked thank you posting that section for me, confirmed I can go single without changing class, yay :)
2022 Subaru BRZ 2.4L WRB Betty
2017 Mazda 3 Hatch 2.5L SOLD

 

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