Smoke machine
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This has pretty awesome reviews
STINGER Brand EVAP Smoke Machine Leak Tester with EVAP Adapter & TWO Smoke Tips. Tests EVAP, Intake, Exhaust, Vacuum Lines, Manifolds, etc - Stinger Brand is The BEST CHOICE in Smoke Testing!!! https://www.amazon.com/dp/B0758ZRBT7..._PuGvDb3JCWCFH
STINGER Brand EVAP Smoke Machine Leak Tester with EVAP Adapter & TWO Smoke Tips. Tests EVAP, Intake, Exhaust, Vacuum Lines, Manifolds, etc - Stinger Brand is The BEST CHOICE in Smoke Testing!!! https://www.amazon.com/dp/B0758ZRBT7..._PuGvDb3JCWCFH
This one does not ship to Canada