carlosking450 155 #1 Posted November 4, 2023 Hello everyone, could someone tell me a website to buy a stainless steel vertical silencer? Thank you. 1 Share this post Link to post Share on other sites
Pullstart 62,913 #2 Posted November 5, 2023 For your 702? There isn’t much of an aftermarket for stacks for direct fit. Sometimes custom is king. 3 2 Share this post Link to post Share on other sites
carlosking450 155 #3 Posted November 5, 2023 If it is for my 702, I would like to buy it finished since I do not have the material or machinery 1 Share this post Link to post Share on other sites
Wild Bill 633 846 #4 Posted November 5, 2023 Joe's Racing Products makes a nice racing muffler. Designed for use on mini sprints powered with motorcycle engines. Not stainless. Se my hot rod post for pictures. 1 Share this post Link to post Share on other sites
Pullstart 62,913 #5 Posted November 5, 2023 Carlos, I understand your struggles being outside of the US, working on a US based piece of equipment. Do you have access or a source in Spain for US thread (NPT) pipe? Your Kohler engine’s exhaust should have a 1” npt outlet. We generally start with a piece of pipe and a 90 degree elbow, then build a stack, with your muffler of choice. It is good to clamp a support rod onto the pipe, and bolted to the engine to help with the extra weight. 2 Share this post Link to post Share on other sites
Pullstart 62,913 #6 Posted November 5, 2023 Here is some inspiration, if you will. I used a 1”x3/4” PIPE BUSHING, then 3/4” pipe. This is all BLACK PIPE not galvanized. I ran a STREET 90 and welded a tank spud (female pipe thread) into the automotive glasspack muffler. Many people run a standard 90 and a length of vertical pipe, and clamp a muffler on. It’s all preference. You can see the clamp on support I built as well. It is steel tubing, with small tubing welded perpendicular, then slit on a saw to create a clamp when bolted together. 3 1 Share this post Link to post Share on other sites
953 nut 55,323 #7 Posted November 5, 2023 I have used a 1" X 1/2" X 1" black iron pipe T with a 1/2" pipe plug drilled and tapped to support a stack muffler. 3 Share this post Link to post Share on other sites
peter lena 8,634 #8 Posted November 5, 2023 @953 nut nice lower extension / brace , keeping it , INTEGRAL , with the engine , solidifies and eliminates vibration . way to go , pete 2 Share this post Link to post Share on other sites
carlosking450 155 #9 Posted November 5, 2023 Hello again, this afternoon I investigated in my country and I can surely manufacture one, just one question, do you put some fiber inside the exhaust to reduce noise to just the hollow tube? Thank you all for your quick answers, we are very far away, but at the moment very close time, greetings to all! 2 Share this post Link to post Share on other sites
Wild Bill 633 846 #10 Posted November 6, 2023 FYI, racing mufflers have a straight thru (meaning you can see thru from one end to the other) perforated tube inside a bigger tube with insulation packed in between the two. During engine acceleration the exhaust is louder but quiet during constant RPM. 1 Share this post Link to post Share on other sites
carlosking450 155 #11 Posted November 6, 2023 6 hours ago, Wild Bill 633 said: FYI, racing mufflers have a straight thru (meaning you can see thru from one end to the other) perforated tube inside a bigger tube with insulation packed in between the two. During engine acceleration the exhaust is louder but quiet during constant RPM. Thanks for your explanation, mate. Share this post Link to post Share on other sites
