Asking for help deciding on performance exhaust

[300cd300sdl911]

Hi,

I'm ready to do a performance upgrade on my '85 Carrera (US). I'll be installing a Fabspeed cat bypass and purchasing a SW chip. Now trying to decide on the muffler choice - will be either a one in one out or one in two out. From the searches I've done I believe much depends on the individuals preference for exhaust note (and some build quality issues), but does a two out have any advantage over a one out - except for a change in sound? I'm leaning toward an M&K or a Fabspeed. Present preference is for the Fabspeed as it's easily convertable to two out. Car is a daily driver and may see occational DE events.

thanks for your help.....

[richde]

You've still only got one way into the muffler. After that, the amount of baffling is what makes the difference, not the number of outlets.

The PO put a Fabspeed 1-in-2-out on mine, it's loud, looks good, but very expensive. Not worth it over the competitors, IMO. It's prettier, but you have to crawl underneath the car to notice it.

[RWebb]

Originally Posted by 300cd300sdl911

Hi,
does a two out have any advantage over a one out - except for a change in sound?

No.

I'd get either a m&k or a Monty. They have both gotten more expensive recently, so check prices. The Monty is proven on a many many dyno runs. It will not cost any hp. The m&k might be a bit cheaper and weighs 1-2 lbs. less.

Either can easily have the RH outlet capped - in fact, Ben makes the caps. The 2 out is definitely a lot louder. Cap the RH outlet when touring with a female passenger or if it drones on a long fwy segment (that you are forced into for some reason).

You can also install an electrically controlled diverter ("Cap") - there are some old threads on this.

[Buckterrier]

Originally Posted by 300cd300sdl911

Hi,

I'm ready to do a performance upgrade on my '85 Carrera (US). I'll be installing a Fabspeed cat bypass and purchasing a SW chip. Now trying to decide on the muffler choice - will be either a one in one out or one in two out. From the searches I've done I believe much depends on the individuals preference for exhaust note (and some build quality issues), but does a two out have any advantage over a one out - except for a change in sound? I'm leaning toward an M&K or a Fabspeed. Present preference is for the Fabspeed as it's easily convertable to two out. Car is a daily driver and may see occational DE events.

thanks for your help.....

I'm in CT also and have a 1 in 2 out M&K. If you'd like, once the weather is better, (and I get my car back), we can get together for you to check fit, & sound. Drop a PM if interested. I may be mistaken but I think they're a bit louder with a 2 out. I love the sound of mine. Maybe Ben from M&K will chime in.

[300cd300sdl911]

Thanks for the input.....