I Own a 2000 Z22 Donzi Bowrider 5.7 - 250HP Want to Purchase
an Exhaust System -- Captain's Call or Silent Choice etc. I/O Cavity is Smaller than the 22 ZX's. Getting Nothing but Negative Info.
Hope You Guys Can Help. Thanx!!!! FJB20
[email protected]

FJB20

What kind of negative responces are you getting? We offer our Sound Advantage systems with both a straight through, or low profile systems that might meet your needs!
Give us a call 800-899-8058
IMCO www.imcomarine.com

FJB20,
Do you just want the open exhaust during speed runs and it quiet in the marinas? If so, mount your tips under the waterline, then when its on plane it will bring the tips out of the water for the loud noticeable sound.

Imco- looking at your site, what is the difference between the thumper vs powerflow exhaust. May be interested in 2 pair for some beefed up 502's

outlawinil- Thumper Power are all cast aluminum, for those who have stock motors, and want to gain some performance, and shave weight.
Powerflow is for larger horsepower motors up to around 650hp. Anything above a 502ci, than you would use our Powerflow Plus.

IMCO www.imcomarine.com

IMCO,
Sounds like the Thumper would be what I want. My problem is I have stagered engines with stock manifolds. The forward engine has an extended riser, it's simply anotherpiece bolted in between the maniflod and the elbow top. Do you make anything acomidate this? I don't want to change my polished SS tail pipes.

Looks like you have a 6" riser for the Powerflow manifolds. Is that what I would need? Does it also go with the Thumper? I've got Stock 454 mags.

Payton,
The 6" risers may work for you if the spacer is 6".
Thumper Power is only available with a cast aluminum riser, in one height.
IMCO www.imcomarine.com