My Jones glasspacks arrived this past Thursday, so I broke out the sawzall and cut apart my factory ClassicRoadsters side pipes...
You guys weren't kidding - The inserts inside these mufflers are TINY - only 1-1/2" ID:
Here is one of my $34 Jones glass packs tacked into place (4" diameter, with 2-1/2" core tube, and 30" length:
Then I removed the exhaust, finished the welds, cleaned everything up with a wire wheel and degreaser, then hit it with 3 coats of silver Ultra high temp Barbeque paint. After drying overnight, everything got bolted back onto the car, and you wouldn't know they weren't the same sidepipes - Everything looks identical to the way it was before:
Performance-wise- I agree with DV- WOW, and thanks!. Best $100 weekend car project ever.... There was easily 25-30 more HP freed up, and the throttle response is much improved as well. Awesome.
Sound-wise - The glasspacks make it deeper, raspier, and more "bass" sounding... Oh, and LOUDER - But a good loud - to me it sounds perfect now. It still cruises silently in 5th gear so you can have a conversation with your passenger, but when you romp on it, it can drown out any open-piped Harley in the area
- One side note about the sound- The glasspacks do make it spit, pop and burble on downshifts - I love that myself, but if you don't like that, then these might not be the mufflers for you.
I shot some comparison videos of the sound and loaded them to Youtube. Take a listen:
https://youtu.be/rLjC3GdzjHU
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