mcraymond3

4.5 inch dry exhaust, which muffler would you use?

formuladude312

Not sure if they make 4.5 or how they would be with dry exhaust but the GGb Extremes if they will fit your application would be my recomendation, I know a couple of guys that i boat with that have them no rpm loss or horsepower loss, I will be puting on a set on formula this year to avoid the noise police.

GPM

You can see those mufflers at GGB.CA

paradigm shift

Worth a look. Has some nice deals on these right now. Not sure they have all sizes available yet.

http://www.gibsonperformance.com/vie...fflerflyer.jpg

Attack

I've been using GGB inserts. They work great, but they are not quiet enough for our 3 year old girl. If she in on-board I install the GGB slip-on mufflers. You would think I'm running a stock 350, but actually I'm running n/a 750's. It's amazing. If you are running a stinger dump tube, I would not run them through the mufflers. I think you could get splash back. I would stick with dry exhaust.

mcraymond3

Attach,
Which ones are you using, the curves or bullet? I had to go to dry b/c of reversion. Will these still work?

Thanks,
mat

formuladude312

Mcraymond, I think you can use the high flow louver inserts from ggb they have 4 1/2 and are for dry exhaust, Biggus on the board is using these with the ggb extreme mufflers and has had a significant reduction in db's around 89 db's from well over 100 db's but no loss in mph or rpm's, Jeff

Attack

Mat,

I'm running Stelling big tubes with the stinger tip. My clamp-ons are M-4530 Extremes, and the inserts are SI-4070. I would suggest calling Gram at GGB. He will fix you up (888)-828-7268.