GGB Extreme Mufflers
 

I just got my set of GGB Extremes from Trick Marine. I will be giving them a try this weekend. I am a bit concerned about how they mount. I got the clamp-ons. According to the paperwork that came in the box, it is recommended that you drill a 3/8" hole into the outer pipe of the tailpipe. Then tighten the lock bolt so it goes into the hole you just drilled. Sounds simple enough, but here is my problem. I just got a new set of CMI headers and full dry tails. I really don't want to drill a hole in a brand new set of tails nor do I want to have any water mixing with the exhaust. I know it is a small amount of water and would most likely not cause a problem but the whole idea was to have dry tails. I called Graham @ GGB today. He told me that you don't have to drill a hole, the 3/8" lock bolt should be enough once it is bottomed out against the outside of the outer pipe. I am a bit concerned that the muffler is going to end up in the bottom of the ocean tomorrow. Is anyone else running clamp-ons with out drilling the hole?

Re: GGB Extreme Mufflers
 

I've had other customers with the same concern. We mounted the GGB's with the clamp only and put a safety cable on instead. It's just a short length of cable from the muffler to the transom "just-in-case".

The fact is that they never slipped but my customers where as concerned as you are. Go down to West Marine or Boat US and get 12" long ss cable with eyes. I usually include that when I sell the clamp ons.

Fionn

Re: GGB Extreme Mufflers
 

Do you not want to drill the hole because you are afraid of reversion? That far out on the tails would be safe with a huge race only solid roller if they are otherwise dry.

Re: GGB Extreme Mufflers
 

Lofty,
I thought about adding a cable just to be safe. But then I thought about what would happen if they did come off and were teathered to the transom. I would rather loose the mufflers than wreck the transom with them bouncing off the water at speed.

wettevette,
I am not afraid of reversion. It just would bother me to pay extra for dry pipes only to make them wet again.

Re: GGB Extreme Mufflers
 

I think he's cringing at the thought of knocking holes in his spendy new tail pipes. Which I can understand.

Re: GGB Extreme Mufflers
 

I don't blame you for that. I haven't installed mine because I don't want to scratch the tails up. I keep them in the truck so if and when I get harassed by the noise police I will install them. Hopefully I never have to put them on, but I doubt I will get that lucky.

Craig

Re: GGB Extreme Mufflers
 

Just drill the holes and be done with it.
Better than safety cables hanging off the transom with GGB mufflers connected to them.

Re: GGB Extreme Mufflers
 

Rus,,
I wont use the cables.

Re: GGB Extreme Mufflers
 

Vinny,

I didn't drill a hole and my extremes have not moved at all. I wouldn't worry about it.

Re: GGB Extreme Mufflers
 

Well I lost a set of clamp on HPI's....of course that company doesn't provide any install instructions or suggest drilling a hole to keep them on.

Re: GGB Extreme Mufflers
 

Sounds like you should use one of these.

Re: GGB Extreme Mufflers
 

I don't like the idea of cables much either but it's what some people want. The slight damage to the transom would be a whole lot easier to stomach than the damage from a clamp on going through a prop!

The best approach is to follow the manufacturers instructions and just drill the hole.

Re: GGB Extreme Mufflers
 

I just got back from my first run with the mufflers. I have to say that I am very pleased with them. I kept them full dry. I removed the inner rubber flapper as Graham had told me to do. While I don't have access to a decibel meter, I can only comment on the way it sounds to my own ears and from a few friends. The mufflers took out the real loud cracking noise. Now while at idle, you can have a conversation with the person next to you. It is nowhere near as loud as it was. GGB advertises a 9-12 decibal drop for full dry pipes. I am most likely still in the high 90 range @ idle. I think it will be good enough to not get stopped anymore. You can still here that there is a motor in the boat but the noise is alot more reasonable. The best news is NO SPEED LOSS AT ALL.

Thanks to Fred @ TrickMarine and Graham @ GGB.

Re: GGB Extreme Mufflers
 

Fred,

My exhaust system is covered but my wallet is empty... :eek:

Re: GGB Extreme Mufflers
 

For those out there with 500 hp or less we now have the GGB Cyclone Series available. They're under $300 per set so you'll have some cash left to take your girl to dinner! The Cyclone inserts are even cheaper.

I just installed set on a customers 29 Fountain with a fresh Raylar 496 this morning and it ran great with no performance loss. Nice and quiet. :cool:

As usual we have the lowest prices out there!

Fionn
[email protected]
925.952.4240
510.541.8124

Re: GGB Extreme Mufflers
 

Clamp On

Re: GGB Extreme Mufflers
 

Transom

Re: GGB Extreme Mufflers
 

and the all so affordable Insert!