answer:This is my third attempt at doing this. I know nothing about Glasspack exhaust systems, but I do know about High Performance Exhaust Systems if that’s what you are wanting. I’d go with this
http://www.flowpowerexhaust.com/performance/?N=10336+4294963364+1616+11920+9292 The Magnaflow exhaust has a more deeper throatier sound. You’ll get more horse power, more torque and better fuel mileage. Also, since you are considering a new exhaust system, You should seriously consider a CAI (Cold Air Intake) and SCT X3 Power Flash, there are many different brands and I just happen to have bought that one! Plus! You get free tunes for life! (and I don’t mean music) Here are some other performance Parts and Accessories sites. I personally have used this company and trust them! www.autoanything.com
http://www.autopartswarehouse.com/vehicle/2001/ford/ranger/xl/6_cyl_4-dot-0l.html http://www.horsepowerfreaks.com/performanceparts/Ford/Ranger also check out these Ford Forums.
http://www.fordrangerforum.com/ you can get all kinds information, How to’s to trick out your pickup. or just Google 2001 Ford Ranger. I have a 2007 Ford Mustang V6, manual trans. The first thing I did was to purchase a Ford High Performance Racing Dual Exhaust System, JLT Cold Air Intake. In case you don’t know, if you go with the CAI. You MUST purchase a Flash Tune, it will rewrite the on board computer chip because of allowing so much more air. Shoot, I have to go to bed, I am spending more time Backspacing then I am typing forward. I apologize for any typos, I am too tired to look and correct. Alright, it’s waaay past my bedtime. Good luck and have fun!