James Jones
Well-Known Member
- Joined
- Jul 1, 2002
- Messages
- 2,854
I just got finished installing an after market exhaust system form Gibson on my truck. (NOTE : my truck has a Volant cold air intake and ram air system , all transmission gear and motor oil is Royal Purple) I was lucky enough to have access to a dyno just up the road so early this AM we made three pulls for a baseline and got an average of 293 rear wheel horse power and 319ftlbs of torque , the exhaust system added 9hp and 14lbs ot torque with the computer set at factory spec reset the computer to performance and the power gain was another 21hp and 33lbs torque , the gain from the computer before the exhaust was only 18hp and 23lbs of torque so the exhause helps take advantage of the computer porgraming also. Thats a solid power gain from the exhaust only and any time you improved your power without adding fuel you gain milage !!
You guys might like to know that the after market Gibson exhaust I got is a direct replacement for the factory , istalled in less than 30 min after the old one was out , and its no louder in the cab than the factory system , well maybe a little bit if you stomp it , but at 40 , 60 and 80 mph cruse its no louder than factroy. I paid about $350 for the package with free shipping from Stillen , and it was delivered in about 8 days drop shipped from Gibson. I highly recomend the Volant cold air intake and ram air package with the Gibson exhaust that will give around 20 hp and increase your milage especialy at hwy speeds.
My truck is listed as having 310hp and 330lbs torque ( 05 5.3L ) and I'm pretty sure thats rated at the fly wheel of the engin and the the rear wheels. So as of right now my truck is making 323hp and 366ftlbs of torque at the rear wheels , its quite impressive to feel a truck with this kind of power at the rear wheel and still gets 20 mpg with the cruse set at 75mph with no traffic in front !!
Next is a set of JBA headers and they have proven to add 12-17hp and 15-30lbs of torque.
You guys might like to know that the after market Gibson exhaust I got is a direct replacement for the factory , istalled in less than 30 min after the old one was out , and its no louder in the cab than the factory system , well maybe a little bit if you stomp it , but at 40 , 60 and 80 mph cruse its no louder than factroy. I paid about $350 for the package with free shipping from Stillen , and it was delivered in about 8 days drop shipped from Gibson. I highly recomend the Volant cold air intake and ram air package with the Gibson exhaust that will give around 20 hp and increase your milage especialy at hwy speeds.
My truck is listed as having 310hp and 330lbs torque ( 05 5.3L ) and I'm pretty sure thats rated at the fly wheel of the engin and the the rear wheels. So as of right now my truck is making 323hp and 366ftlbs of torque at the rear wheels , its quite impressive to feel a truck with this kind of power at the rear wheel and still gets 20 mpg with the cruse set at 75mph with no traffic in front !!
Next is a set of JBA headers and they have proven to add 12-17hp and 15-30lbs of torque.