So I'm Hanna put an exhaust in my truck and I'm lookin at dynomax but haven't heard much about them does anyone have some info on them or maybe a better brand

 

If you're looking at dynomax look at the bullet. What are you looking for as far as sound level? Do you want a upgraded single, duals, or stock replacement?

 

Upgrade single prolly gonna do cat back I was lookin at the dynomax ultraflow welded as far as sound I want a deep throaty sound with better flow obviously

 

IMO the best and cheapest option is going to be to get the parts and have a shop weld them in for you. Upgrading to 3" stainless pipe will be best for a single system.
1. Start by removing the stock Y as it is a large restriction point. Replace with:
http://www.summitracing.com/parts/MPE-10778/
2. Have the shop put in a straight 3" piece up to the muffler.
3. Muffler should be of your choice but a straight through will be best for flow. The Dynomax bullet, Magnaflow, and Borla are all good choices.
4. For the tailpipe get a pre mandrel bent piece as most shops don't have a mandrel bender.
http://www.summitracing.com/parts/MPE-10778/
5. Finish with a tip of your choice and you're ready to go.

 

Alright thanks the advice