I am looking for injector wash plugs for 2.5" traditional Kinsler. All I can find are the red plastic cups. Does anyone know of anything that seals with an o-ring?

The red cups seal nice. I use them to wash mine. The other option is to use king/br Motorsports wash plugs.... They're kind of pricey but seal with a o ring and are super nice/cool looking anodized aluminum with spark plug/nozzle holders built in

I've looked everywhere and nobody sells any of the o-ring style for a 2.5" inj. Speedway, BR, Allstar, Moose,etc. I guess the red caps it'll be. Thanks

Oh yeah my br plugs are larger for 360 injection. The plastic ones seal nice on my limited motor though I wouldn't worry too much.

A little tip on using the red plugs,I always fold up a piece of paper towel and put it on top of the butterflies then put the plugs in and then put some duck tape on the outer edge of the plug.
The paper towel will adsorb any excess water that might get inside there. I've done it like this for years and never had any problems and that's a heck of a lot cheaper than the o-ring style.