Topic: Noise levels without the cat

[snaponbob]

I have both a MagnaFlow 3" cat back and a Solo Performance single 3" Race Pipe. During the Solo season I have run the S.P. Race Pipe with complete satisfaction because I can HEAR the engine with my helmet on. In normal driving it's not too loud. During the off season I run the MF system. Nice mellow sound. With both systems I have been running the OEM cat. Shortly I will be installing a S.P. catless downpipe. Clearly, the stock cat and turbo have proven to be sufficient in keeping the dB levels under control. However, with NO cat I am very concerned with the noise level of the exhaust if it isn't muffled. Jeff @ Solo Performance says the car will be quite loud with the Race Pipe and downpipe. I can run the downpipe with the MF system, and probably will have to do that to keep the car liveable during the season.

Who is using either a high flow cat or catless downpipe, what exhaust are you using, and how loud is it?

[spicy3480]

I am using SOLO's higher-flow cat.  I will say that it is about 20% louder with this cat, so I would imagine it would be even more than that if you eliminated the cat altogether. 

[snaponbob]

I am using SOLO's higher-flow cat.  I will say that it is about 20% louder with this cat, so I would imagine it would be even more than that if you eliminated the cat altogether. 

What exhaust are you using?

[RUTurbo]

I'm have RPI's GT exhaust and cat-less "race" down pipe and I haven't noticed much of an increase in noise levels driving around town or coasting on the Turnpike, however you can notice it to e a bit louder at RPM's above 3500. Not a big deal since in 5th you are cruising at a pretty good clip of speed before you get that high up in the rev range.  And the deeper sound to me is enjoyable, it's got a nice deep grunt to it not common to 4 cyl engines, most the guys in my car club can't believe its a 4 cyl when I first tell them because of the deepness of the tone.

[spicy3480]

What exhaust are you using?

I have a center stacked exhaust without a muffler, so it would be a street race setup.

[lil goat]

I had the Solo Street Race set up with the hi flow Solo cat for about a year, the performence was excellent and the noise was not that bad. I changed to the Solo Mach, because of the noise outside the car, it just drew to much attention from the Police, I never drove past a cop even doing the speed limit that they wern't staring right at me. I am very happy with the Mach and the hi-flow cat. I don't get near as much attention as I used to.

[Go-N Def]

I had the Solo Street Race set up with the hi flow Solo cat for about a year, the performence was excellent and the noise was not that bad. I changed to the Solo Mach, because of the noise outside the car, it just drew to much attention from the Police, I never drove past a cop even doing the speed limit that they wern't staring right at me. I am very happy with the Mach and the hi-flow cat. I don't get near as much attention as I used to.

You're not supposed to give them the finger as you drive by....

[snaponbob]

Better to flip a bird than THROW A SHOE. At least in Bahrain.

[Go-N Def]

You can actually get arrested if you flip a Bahrainian the bird.  That goes for any Arabic person here.  It's so hard not to with the way they "drive" over here...

It's OK if they do it to you.

[Deep-GXP]

If you run the Solo Catless DP with the Magna Flow you should still be at a tolerable noise level, but as soon as you swap the MF with the Solo exhaust...shits gonna be loud

I would assume that S.P. DownPipe with MagnaFlow will still be more quiet than Stock cat with race exhaust ?
or maybe just about the same?