Exhaust Cone Adapterby AutoolUse : Make smoke leak testing with a smoke machine via larger openings a whole lot easier! Simply fit the cone into diagnostic site (ie. exhaust tip or intake boot) and inject smoke through the adapter hose for testing system leaks.- NEW LARGER SIZE! Will fit almost all exhaust tips and intake boots.- Made for larger openings- Compatible with ALL Automotive EVAP/Vacuum Smoke Testers such as Autool, OTC, Redline, and more.Automotive Grade. Superior Fitment. Lifetime Warranty.