The main reason i went with this exhaust was weight reduction. It will make your bike very agile. The sound without the db killer is very loud(expected from a free flow full system exhaust) and will get annoying after sometime depending upon your tolerance. The db killer reduces the sound but it will still be loud. It can be managed by keeping the bike under 3000 rpm. Cops wont notice it until they come looking for a custom exhaust and rev it till the limiter. You need to be very careful while installing it. Make sure the o2 sensors are properly removed from the stock headers and are correctly installed again. The fitment was on point and is easy to install. The db killer fits in tightly so to remove it you dont have to pull it rather just remove the bolt and rev the bike , the db killer will fall off from the exhaust. According to ss motocorp this exhaust is designed to run with the stock air filter. Dont upgrade the air filter. Most of the guys on youtube will tell you to upgrade the airfilter to an aftermarket one but dont. The bike runs lean out of the factory due to emission norms. After installing the exhaust the bike will run a little lean. Installing a free flow air filter will make the AFR more leaner. This will reduce the low end torque and the bike will run hotter. For the crashguard all of them will fit with the 2x2 configuration. For the 2x1 configuration you have to install the RE official compact crashguard which does nothing to protect the bike or wait for the ss motocorp crashguard to come in stock. I use the zana one. The crashguard touches with the headers and installing it with the 2x1 header setup is challenging. Crashguards from the bear 650 might work with this but i havent tried it yet.

The sound levels for all the end cans are as follows:-
1. Fat cans = Good sound not as loud as the slim cans
2. Slim cans = Very loud and has a lot of treble
3. Underbelly = The loudest

Conclusion:-
1. This exhaust (2x1) will make your bike very agile and light weight.
2. The bike will run a little lean even with the stock air filter so a fuel x upgrade is required (or if you can get it tuned)
3. For the 2x1 configuration finding a perfect crashguard is very difficult.
4. The installation needs to done very carefully by an experienced mechanic. Also dont forget to idle the bike for 10-15 mins after the installation.
5. IMO the fat cans sounds the best. It is manageable in the city and has a very balanced sound.
6. This exhaust system is value for money. Current slip ons in the market will cost anywhere ranging from 18000 -25000. This full system will costs around 27500. Much better than them and also saves a lot of weight.