Quote:
Originally Posted by edj
The cap is easy to put on/take off. (...)
The threaded plug solution would be more difficult to remove. I would take
it easy removing it as the end of the sound tube is soft rubber and I am
not sure how securely it is fastened. I might be possible to tear something.
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Thank you! I did not realize that the Hillman plug would go around (i.e., on top of) the sound pipe hole -- I had thought that both types of plugs (Hillman and threaded) would go inside the tube, hence my worry. I like the Hillman much better -- Lowe's had them as pairs for $1.70, but the sales guys who found the drawer for me managed to find a bag that had one missing and I got it, all done, for half that price.
Evaluation: easy to put on and take off. The sound reduction is amazing -- my passenger could not believe the difference that such a small mod made. IMHO, for someone who commutes, this may well be a no-brainer. As for me, after driving my BRZ spiritedly for half an hour with the cap on, I started missing the "shrieking" of the engine above 4-5k rpm. When I go on a cross-country tour this summer, I may well put it on for days when I'll be driving a lot; for the shorter drives until then, though, I'll keep the cap off and the sound pipe unhindered.