Added the Vance & Hines exhaust to my Street Twin
Have added the "off road" Vance & Hines exhaust to my Street Twin, and put about 130 miles on the bike with the first test ride. While the stock exhaust looks and sounds super, the Vance & Hines looks equally great and really enhanced the bike's performance and sound. This is the exhaust that compliments the Street Twin's mid-range torque.
Installation was rather straight-forward (assuming you've swapped out a Triumph Bonneville or Truxton exhaust before). There are a few rubber mounting pieces that need to be removed from the stock slip-ons and replaced onto the Vance & Hines set, as you don't get a second set. One bit of advice about the need to remove the rear passenger foot pegs, as required. In order to remove the pegs and swap out the exhausts, you actually have to first disassemble the pegs down to the small ball bearing, small spring and metal clip. That is because in order to briefly remove the pegs, it takes an allen head wrench and another wrench, and there is insufficient room to fit the allen head without taking the peg completely apart. A little different and slightly more time consuming compared to removing passenger pegs on a 2015 and earlier Bonneville or Truxton. If not done very carefully, it's really easy to send the small ball bearing and spring shooting out and being lost. (In my case, briefly hidden till found as I crawled around on my knees looking for it on the garage floor.)
The workmanship of the stock exhaust system and the Vance & Hines are identical, so I assume its all made by the same company. The Vance & Hines set is about 3" shorter in length. Also, the Vance & Hines system is considerably lighter in weight, perhaps by 40%. I am guessing at 40%, but I feel that's about accurate. The weight savings is very noticeable between the two. I was really glad to gain this weight reduction. I didn't have a set of scales to measure, however.
The stock system has no removable baffle. Once removed, I could look from end to end through the inside. There are no internal obstructions. However, the inner wall of the stock exhaust tube running from end to end looked sealed with respect to there being no obvious openings to the outer chamber. Maybe there is one, but I couldn't see it. In contrast, the Vance & Hines has a small removable metal clip holding in a simple snap ring. Removing that allows for the 3" to 4" baffle to come out. It looks a lot like a trumpet mouth piece. When looking through the Vance & Hines exhaust, you also easily see end to end, and, the entire inner chamber is perforated with plenty of holes from end to end, incorporating the outer chamber as well. With the baffle removed, the end of the exhaust opening is larger than stock and much better looking. (There is no way to "bore out" the Street Twin's stock exhaust and make it compatible with the Vance & Hines, as can often be done with stock Harley-Davidson exhausts verses Screaming' Eagle exhaust upgrades). Stock verses Vance & Hines Street Twin exhausts look almost the same on the outside, but differ totally on the inside.
The dealer told me I would need to bring the bike in for the required ignition remap, and until I do, I may experience some popping on deceleration, etc. But I can report that the bike ran super today with zero popping, stumbles or other indication of an immediate need for the remapping to be done. I was pleasantly surprised about that. In fact, the Street Twin performed so well it makes me feel the Vance & Hines exhaust is ideally paired to make full advantage of the mid-range torque. I have no access to a dyno for the moment to document any performance gains. But I can say that the bike's quickness from a stop up to 90 mph (before shifting into 5th) easily beats my past new classic triumph Truxton's and Bonnevilles that all had Predator or Arrow exhausts, air box removed, K&N air filters, etc. (Let the doubters' comments begin, but I know what my Street Twin delivers versus my previous Triumphs).
In terms of sound, the Vance & Hines set is a little louder than stock when started, but not obnoxious at all. A very deep resonance that is quite different from Predators or Arrow systems. However, if you give the Street Twin full throttle, the Vance & Hines exhaust barks with a very deep v-twin sound, a lot like what I've heard on an Aprilia, Buell or Ducati at the VIR track. After 4 hours, it didn't wear out my ears the way Predators on a Truxton would give - just my opinion.
Attached are two photos - one of my bike with the shorter Vance & Hines exhaust (and Triumph rubber tank knee pads mounted), and the other photo showing the inside of the exhaust.
I highly recommend the Vance & Hines exhaust and its a worthwhile accessory worth the cost.
Last edited by Scrambler900; 02-29-2016 at 08:17 PM.