the exhaust is a full 50mm 2 into 1 Sil-Motor with a Termi can. i did a little tweaking on it and made the rear bracket myself. it tucks in real tight and sounds great.
you can use any bolt and nut combo that fit into the steering stop bosses. i went to a local hardware store and bought 2 cool black allen heads and bolts to replace the stockers when i lost one. just watch the length of the bolts. make sure you can turn the bars full lock each way and nothing binds like a clutch line or throttle cable.
here is a pic of the Hotrod M944. i love this bike.