I e-mailed Gibson but never got a response. As much as I hate the idea I will have to use mufflers on some area lakes. Will I have to change my slash cut tips or cut mine flat in order to use clamp on mufflers?

Talk to Graham at GGB

My prices can't be beat on GGB's! I've got 4", and 4 1/2" clamp ons in stock. You don't need to cut your tips, the clamp ons should work fine as they are. Let me know I can have them in your hands by Tues!

Fionn
[email protected]
925.952.4240
510.541.8124

Some pics of the transom mounts

Clamp on.

anasazi,

I fought the mufflers for a long time. I finally put on a set of GGB Extremes. I had no power loss and the motor still sounds great. BTW, my motor is an NA 540, dry CMI's. All from Fred @ TrickMarine

Thanks for the input so far. My concern is; my tips measure 9 1/2" on the top and 5" on the bottom. Thats a 4 1/2" difference. If I'm going to get at least 3" of the bottom part of the pipe in, that means 7 1/2" of the top has to enter the muffler. Is that possible, and if so, wouldn't it interfere with the baffles?

If your interested, I have access to a brand new set of 4" GGB Extreme clamp ons that you can have for $650 shipped. These are brand new in the box and have never been put on.
Dave
PM if interested.

Anybody check egt's after adding the GGBS mufflers?

anasazi, I'm no expert but I doubt that anyones clamp ons will work with your tips without cutting them off staight. Most clamp-ons "eat-up" less than 3" of your tips before they bottom out on the baffles. Don't forget that most mufflers are around 9-10" in lenght so I think you'ld want to trim the tips so your total lenght doesn't get out of hand! Steve