Originally Posted by M3to335
Here is one for ya. Ive officially made this even cheaper buwhaha. Instead of taking $0.25 for the pipe caps, throw tape around the outlet then use the black cap off a quart of oil and thread it on. Its a much tighter fit as well.
And completely free hahahah.
I would go for the pipe caps. Whatever you do make sure its sealed well.
How's it sound?