1" Threaded Exhaust Flange Compatible with Pr-edator 301 420 340 390 22hp 670 Generator or other applications where a custom exhaust

Replaced Chinese go-cart muffler that kept falling off With this and a lawn mower muffler. Worked very well and has fixed the problem.

As other reviewers noted, this is not an NPT thread. Also, the flange is NOT compatible with the 22 hp 670. Flange is too wide and must be modified to fit that engine.

Made well, had to return would not do what I needed, to bad it is well made

First off, the flanges are thick, welds appear good, and overall "ideally" better than stock; however, they are 110% too large to fit a Predator 670cc without mods. Also, the provided nuts are trash, basically- too large. I ended up cutting down a 9/16 socket to make it work. As-is, the nuts strike the pipe on each rotation. I would've just made my own if I knew these were so poorly designed.

Bought them for a honda gx620.Tge bokt pattern is the same but it's not a direct fit for a gx620(its not supposed to be)To fit a gx620 from you need to grind the flange or head fins to fit it on.Bolts line up and the gaskets work.To address the thread.It is infacr 1" NPT but whoever threaded it didn't make the cut deep enough.NPT is tapered......if using a die you need to thread it about 1/8" more to taper it enough to actually fit 1"NPT.I was able to barely start 1 thread by hand.A proper 1"NPT should go atleast 3 threads hand tight.None the less they worked and helped me out.Excellent looking construction for sure.

Worked perfectly along with a $8 muffler I purchased together with this on my 2008 Troy Bilt Bronco Lawn mower after the original muffler blew off. Saved over $100 going this way!

Part looks good; however, it’s not exactly standard MPT. It’s Chinese MPT. Normally you can get two to three revolutions before it begins to tighten. NOT with this part. It will be tight at 3/4 to 1 turn. You can even see that the thread pitch is not standing pipe thread… my guess is Chinese metric or something they use in china.

Threads are not great had to clean them up before I could use it