GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

Sound clip with gutted cats?

Thread Tools
 
Search this Thread
 
Old 03-28-17, 09:41 AM
  #1  
Mr4btTahoe
Rookie
Thread Starter
 
Mr4btTahoe's Avatar
 
Join Date: Dec 2015
Location: Indiana
Posts: 56
Received 11 Likes on 9 Posts
Default Sound clip with gutted cats?

Does anyone have a sound clip with gutted primary cats and stock resonator/mufflers?

A week or so after building my midpipe ('06 GS300 AWD), I'm getting a p0430 (cat efficiency below threshold bank 2) code. From my understanding, some have had to add o2 extenders when the rear cats are deleted... some dont.

In this case.. I'm considering gutting the primary cats and running extenders to keep the CEL off... however I don't want the car to sound ricey/raspy as it's the wife's daily driver. Not spending 1200+ per side for new oem manifolds... and don't want to spend $1200 on ppe headers. The car is getting 25mpg mixed driving conditions... so I strongly doubt there is an issue with the primary cats.. so I may end up just running extenders.. but would like to see what the other option sounds like..

Anyways.. does anyone have a sound clip with the primary and secondary cats gone with stock exhaust otherwise?
Old 03-28-17, 10:20 AM
  #2  
aristo1987
Pole Position
 
aristo1987's Avatar
 
Join Date: Aug 2013
Location: ca
Posts: 232
Received 53 Likes on 27 Posts
Default

Originally Posted by Mr4btTahoe
Does anyone have a sound clip with gutted primary cats and stock resonator/mufflers?

A week or so after building my midpipe ('06 GS300 AWD), I'm getting a p0430 (cat efficiency below threshold bank 2) code. From my understanding, some have had to add o2 extenders when the rear cats are deleted... some dont.

In this case.. I'm considering gutting the primary cats and running extenders to keep the CEL off... however I don't want the car to sound ricey/raspy as it's the wife's daily driver. Not spending 1200+ per side for new oem manifolds... and don't want to spend $1200 on ppe headers. The car is getting 25mpg mixed driving conditions... so I strongly doubt there is an issue with the primary cats.. so I may end up just running extenders.. but would like to see what the other option sounds like..

Anyways.. does anyone have a sound clip with the primary and secondary cats gone with stock exhaust otherwise?
Mods,

True Cai rerouted to the lower bumper
Midpipe
Custom exhaust
Ppe headers
Ecu tuned
Transmission ecu tune still in the works.

Currently making 334hp

Last edited by aristo1987; 03-28-17 at 10:25 AM.
Old 03-28-17, 10:32 AM
  #3  
L's TLS
Pit Crew
iTrader: (1)
 
L's TLS's Avatar
 
Join Date: Aug 2007
Location: MD
Posts: 242
Received 37 Likes on 20 Posts
Default

Got an sound clips under load? 334whp is impressive
Old 03-28-17, 01:31 PM
  #4  
Mr4btTahoe
Rookie
Thread Starter
 
Mr4btTahoe's Avatar
 
Join Date: Dec 2015
Location: Indiana
Posts: 56
Received 11 Likes on 9 Posts
Default

Got anything off idle? How's it sound when you open it up?
Old 04-21-17, 12:30 PM
  #5  
brker1
Driver School Candidate
 
brker1's Avatar
 
Join Date: Jan 2015
Location: new hampshire
Posts: 18
Likes: 0
Received 0 Likes on 0 Posts
Default

nice sound..good job
Old 04-28-17, 03:42 AM
  #6  
LoveThatV8
Pole Position
iTrader: (1)
 
LoveThatV8's Avatar
 
Join Date: Aug 2014
Location: SoCal, Northridge 818,310,323,626
Posts: 302
Likes: 0
Received 4 Likes on 4 Posts
Default

I had test pipes on, but I was forced to take them off due to a loud exhaust ticket. It sounded like a v8 stang on x-pipes, anyways I put the stock back on to pass the noise compliance test and barely stayed at the 94 db mark for a v8. The thing is I left my o2 spacers on with the stock cats and its throwing a p0136 & p0156. I deleted it with my obd2 scanner, but sooner or later it'll pop up again thinking I don't have o2 sensors on. My dilemma is Idk if I should put back my megan test pipes or remove the o2 spacers & forget the test pipes? Man I wish I didn't live in cali, I get smogged every 2 years and don't wanna end up stripping the 14mm bolts removing the cats on and off.

As for the OP, I have a sound clip somewhere on youtube with megan tps, deleted resonators on mid pipe, attached to hks axle back. Drone is loud in cabin but idk man, I don't wanna go through the hassle of cops pulling me from loud exaust, put the stock back on, get tested for db noise test, then pay fix it fine to court. Maybe I should sell the test pipes & o2 spacers with it?
Old 04-28-17, 03:56 AM
  #7  
LoveThatV8
Pole Position
iTrader: (1)
 
LoveThatV8's Avatar
 
Join Date: Aug 2014
Location: SoCal, Northridge 818,310,323,626
Posts: 302
Likes: 0
Received 4 Likes on 4 Posts
Default

https://youtu.be/PloyRZOqTF0

it
isn't gutted, but in the midst of swapping it out, for kick I ran open headers and damnnn... I instantly was amazed by it but only for 30 mins. lol
Old 04-28-17, 02:52 PM
  #8  
Vooduguru
Lexus Test Driver
 
Vooduguru's Avatar
 
Join Date: Mar 2008
Location: UT
Posts: 823
Received 6 Likes on 6 Posts
Default

Why not do high flow cats in lieu of gutted cats? That way you get the right (improved) flow and not the super loud sound?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
redb202
IS F (2008-2014)
12
04-06-15 12:18 PM
Scweet14
Performance & Maintenance
10
12-01-11 03:33 PM
jadeboy
Performance
8
02-16-11 05:07 AM
Lexizm
Performance
15
10-10-07 08:07 PM
B@tm@n
IS - 2nd Gen (2006-2013)
15
03-18-07 03:02 AM



Quick Reply: Sound clip with gutted cats?



All times are GMT -7. The time now is 08:23 PM.