Ski Nautique Y-pipe exhaust

Throttle out- anyway you could post a pic? I have an 89 as well and am about to do the same and just want to make sure I route everything correctly. Many thanks!

I restored a bubbleback last year. It came from the PO with the Y-pipe which I've left as is. I would have bought a new hullhugger muffler until I saw the price! Noise doesn't seem too bad to me but I never heard it with a muffler.

MNLakeSkier wrote: Throttle out- anyway you could post a pic? I have an 89 as well and am about to do the same and just want to make sure I route everything correctly. Many thanks!

I did a muffler delete on our '89 about a year ago. My son uses it so I hadn't driven it until last weekend. I really like the way it sounds. Not too loud, slight drone while cruising but not bad and sounds great wide open. For some reason the '89 was much quieter than the '92. They both have the same muffler except the '89 has smaller diameter risers and less HP.   I like the way the '92 sounds so I wouldn't delete the muffler but I'm glad I did it on the '89. The only issue I had was getting the muffler tubing to bend downward after the risers. It may have been the type of tubing I used. I can take some pictures but it will be a few weeks.

I don't have any photos of my boat but it looks identical to this.

mspalatro wrote: I am looking to get rid of my inverta flo on my 1990 Nautique. Is there much of a performance gain to go straight dual vs y pipe?? I can see straight dual is a much bigger project.

It will sound different, but it is very unlikely there would be any performance gain from going to straight duals with anything near a stock engine. Mostly likely you would see no difference, slight chance the duals would be slightly slower.

The engine does have cam that is supposed to bring it up to 300hp. Everything else is stock.

I am going to with Y conversion. Looking through some old threads I saw there was a boat dr that sold the conversion kits. I checked his website and I don’t think he is still in business. Do you have any online recommendations to buy parts?? Also for the install, was there anything you had to take into consideration like the placement of the Y fitting?? And did you run hose right from Y to manifold or did you use additional fittings for bends??

mspalatro wrote: The engine does have cam that is supposed to bring it up to 300hp. Everything else is stock.

Don’t know who sold you the cam, but you’re not going to get 40 extra ponies from just a cam, with stock heads and intake.