Mechanics and DIYers, this TYRAREX smoke leak detector cone is exactly what you need for finding those pesky vacuum and exhaust leaks! This universal rubber adapter fits pretty much every vehicle out there - from regular cars to heavy-duty trucks with its 4.2-inch diameter. The tapered design is genius because it seals perfectly on intake boots, exhaust tailpipes, and various piping systems from as small as 1 inch up to 3.26 inches. It works with all the popular smoke machines like MR CARTOOL T100, T105, T110, T130 models and SDT series too. The quality rubber is both flexible and durable, so it creates a solid seal without tearing or degrading over time. Using it is super simple - just plug it into where you need to test, connect your smoke machine, and watch for where the smoke escapes to pinpoint exactly where your leak is. No more guessing games with spray bottles or listening for hissing sounds! This thing makes diagnosing EVAP systems, intake leaks, and exhaust issues so much faster and more accurate. If you're tired of wasting hours hunting down vacuum leaks, this cone adapter will quickly become your favorite diagnostic tool in the shop.