Hey guys, i just ordered a Gibson Cat Back for my 4.7... just wondering if any of you installed that system by yourselves or got it done by a muffler shop?
it looks like its a bolt on application so i should be able to do it at my buddy's house but if anyone had minor complications along the way with installing this same application a little heads up would be nice...
well i never really wanted anything loud, im looking for more of a beefy throaty sound and it looks like im 95% there... i just need to drive it a bit more and it will be perfect!
Lucas, i tried taking a pic of my system from under the frame but they all came out crappy.
This is the system i purchased...
Gibson 17404 Single Exhaust System
Product Description
For the enthusiast who wants the most from their vehicle. Engineered and dyno-tested to give you improved acceleration, maximum hill climbing, towing and passing power. Our best performing exhaust system produces maximum torque and horsepower gains at low-end (1800 to 3000 RPMS ) with a deep aggressive exhaust tone.
Keep in mind, I have the 5.7 so our exhausts are different. Mine has a resonator, which looks like a small muffler located right before the tip. The pic above doesn't have one. I have been thinking about having mine removed to make it louder.
ya dude, looks like you have a mini muffler at the end of your set up... that will def quiet up that noise... couldn't you just cut that thing off and throw a pipe in between?
i havent had it long enough to figure out the mpgs
however the low end torque is an interesting question... i dont feel like the jeep is any faster at all... i hate to say this but i almost feel like my jeep felt more powerful with the stock system on.
i am going to re program my SC and see if that helps anything but i notice 0 power gain and maybe even a little bit of loss.
i am wondering if its due to the lack of back pressure with such a flow through system??
i had a professional install it... i watched him use air powered tools to install everything. I know what a leak sounds like, and i dont hear anything like that... although the overall exhaust sound could over power that leak. I will take a closer look when i get home later today, thanks Lucas.
i raced my buddy the other night and he has a lifted dodge ram 1500, exhaust and super chip as well... he's got a 5.2L hemi but had 5 ppl in the truck i only had me and my gf. We were neck and neck the whole time up till 85 mph... no shifting just shifter in D and pedal to the metal... i feel like i should have passed him.
at 2k RPM do you get any extra rev from your exhaust when you're slowing down for a light or something like that? I get that... and have no idea how or why its doing it.
Dgoral I never noticed any hp gains, nor did I notice any hp loss. You might pick up a few hp, but nothing you can feel. The most restrictive part of the exhaust is the cat, so back pressure should be similar.
I am no expert by far, but it seems that most cars/trucks that I've read on, seem to make the most power dumped at the headers. Obviously back pressure with this set-up is pretty non existent.
I just think that with all this added noise it sounds faster, than it truly is.
i tend to agree.. i will get a better feel when i re program the superchip in the Jeep.
Im starting to think that the whole myth about our jeeps CPU learning the SC tune and eventually everything gets returned to stock might actually be true to a certain extent.
I'm not sure how similar these jeep are to the lx, but for them to wake up your car again you have to pull the fuse to the pcm I believe, everyone refers its it as fuse 11.
so i re programmed the Super Chip last night and to my surprise the Jeep runs completely different! I've got more power than i had before and my throttle response is quite epic.... weird that the re program would have such an affect, oh well, im stoked!!!
I have had a Gibson Cat Back on my 4.7l for about 2 years now. I love it! It does move around a little bit because I used the muffler clips provided by Gibson. I just kick it back into place. Does anyone else have this problem?
I used the muffler clips provided by Gibson. They are the U muffler clips, I don't know their real name. I even had my local shop put a few tack welds on the tubing. I checked all the rubber mounts and they all looked good, To me at least.
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