Decrease in WOT sound after cat install...normal???
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Use all 3 Pedals at once
Joined: Jan 2004
Posts: 1,486
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From: All*Cal
Decrease in WOT sound after cat install...normal???
This past weekend I finally had time to install my Random Technology cat. I took it out for a test drive right after the install and noticed a deeper sounding exhaust note at idle and more torque throughout the power band.
When I got home, I decided to put my Injen CAI back on after removing it for the winter. After I installed my CAI, I took it out for another test drive and noticed my TSX sounded so much sweeter than before. I LOVE my Injen CAI/Comptech Header/Random Tech cat setup!
Other than noticing an improvement in power and sound, I also noticed something else. While accelerating at wide open throttle, I noticed my car isn't as loud between 750-5,000 RPM in every gear than before I installed my cat.
Basically, what I noticed is a decrease in wide open throttle noise at lower RPM's. I remember when I only had my CAI and header, my car used to roar all the way from 1,000 up to fuel cut-off. Now with the cat installed, it only starts to roar at about 4,500-5,000 RPM then to fuel cut-off.
Is this normal after installing the Random Technology cat?
When I got home, I decided to put my Injen CAI back on after removing it for the winter. After I installed my CAI, I took it out for another test drive and noticed my TSX sounded so much sweeter than before. I LOVE my Injen CAI/Comptech Header/Random Tech cat setup!
Other than noticing an improvement in power and sound, I also noticed something else. While accelerating at wide open throttle, I noticed my car isn't as loud between 750-5,000 RPM in every gear than before I installed my cat.
Basically, what I noticed is a decrease in wide open throttle noise at lower RPM's. I remember when I only had my CAI and header, my car used to roar all the way from 1,000 up to fuel cut-off. Now with the cat installed, it only starts to roar at about 4,500-5,000 RPM then to fuel cut-off.
Is this normal after installing the Random Technology cat?
Thread Starter
Use all 3 Pedals at once
Joined: Jan 2004
Posts: 1,486
Likes: 1
From: All*Cal
Originally Posted by moda_way
Mine got race car loud. Comptech Header and Cat back plus the RT Cat.... loud but sounds sweet.
...probably because of your exhaust too.
--TSX 3Pedal adds exhaust to wish list--
Suzuka Master
Joined: Jul 2003
Posts: 7,594
Likes: 4
From: Cincinnati, OH
Originally Posted by TSX 3Pedal
At lower RPM's?
...probably because of your exhaust too.
--TSX 3Pedal adds exhaust to wish list--
...probably because of your exhaust too.
--TSX 3Pedal adds exhaust to wish list-- 
Most of the time I'm running with my Comptech quiet tips so that I don't make my son go deaf in the back seat.
Thread Starter
Use all 3 Pedals at once
Joined: Jan 2004
Posts: 1,486
Likes: 1
From: All*Cal
I was thinking that after installing the cat with intake and headers already on...my car would sound louder regardless if I had aftermarket exhaust or not.
It seems as though the people that installed the cat without an aftermarket exhaust resulted in a quieter TSX.....is that what supposed to happen???
It seems as though the people that installed the cat without an aftermarket exhaust resulted in a quieter TSX.....is that what supposed to happen???
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