Chrysler 300C & SRT8 Forums banner

1 - 20 of 91 Posts

·
Registered
Joined
·
22 Posts
Discussion Starter · #1 ·
Figured that I should post how to remove the silencer on a new thread for everyone. Take a look!

First off, remember that Chrysler's factory system is indeed a cold air induction (CAI) kit. Chrysler's CAI just has a big silencer behind the bumper. Remember, just because the aftermarket sells a CAI kit doesn't mean you don't already have one, or that its significantly better than what you have. If anything the stock air box (without the silencer) gaurantees you will have a high flow CAI setup and also ensures you still get air from behind the bumper and not inside the engine bay.

Well, here we go:

1) Safely raise the front of the car 4" or so. I have a set of $30 heavy duty ramps from WalMart for this task.

2) Open the hood, remove the air filter from the car. You will see the top of the silencer now. Stick your hand in there to see how restrictive it is. You may wish to remove the lower air filter housing, it is held on by a bolt near the headlight (right under your nose) and a rubber knob that presses into the body. I don't believe it is necessary to remove the lower airbox, though.

3)From under the car, remove the two front bolts that hold plastic cover below the engine, or remove entirely if you wish.

4) Remove the bolts that hold the bottom of the bumper cover to the chassis, there are about 10 of them. This releases the black liner that is sandwiched between the bumper and the chassis.

5) From the driver's side wheel well, take a forked tool (used to remove door panels, I have an "OEM" brand tool from Autozone for this: $6) to remove the three push pins that hold the black liner to the bottom of the car. There is one near the painted fender and two more further down the wheel well in the same general vicinity. This will remove the top half of the black liner on the driver's side.

NOTE: The push pins are made of two parts: a pin and a base. Only remove the pin with that forked tool, with the pin removed, the ringed base will then pop out when you pull the black liner out.

6) Pull the black liner out from under the bumper and from under the driver's side wheel well.

7) The silencer is now in plain sight. There are two rubber knobs that press into the body and a hook on the top. Pull firmly and wiggle on the side with the rubber knobs to release.

8) Reach up the body of the silencer and you will feel a bolt at the top. You may not find it, but near that bolt is a hook in the silencer that is released by a quick yank down. Having a second person to push on the silencer from under the hood is a good idea.

9) The silencer will pop off easily, it happened so quick on mine I don't quite remember how it happened! Now reinstall the black liner, pressing it inside the bumper and lined up in the fender with the corresponding holes.

10) Reinstall all bolts on the bumper and the pushpins on the fender. Reattach the two bolts that hold on the lower engine cover.

11) Reinstall the air filter and close the airbox...

That's it, you're done! The difference is mild, but worth every penny, since its essentially free! You can install a K&N filter with this mod and you might net 2-5hp more, or the same increase in power an aftermarket CAI kit would.
 

·
BLOODY ADMENSTRUATOR
Joined
·
7,554 Posts
This is so timely. I was just looking at K&N filters and tubing today. I want to get the restrictive silencers out, but still have the factory designed cold air path.

Thanks for the detailed instructions. I'll have a go at it this weekend.
 

·
Registered
Joined
·
265 Posts
So has anyone seen any MPG improvements with this? Maybe .5mpg? And if there's any power to been seen from it, is it up high in the RPM band or down low?
 

·
Registered
Joined
·
2,719 Posts
Thanks, excellent info. With the silencer gone, where does the air now enter the air box, is there a void in the bottom of the airbox and if so, what about water entering from there, sorry in advance if I seem a tad clueless.
 

·
Premium Member
Joined
·
1,010 Posts
good

Thats a good question King.
I love this write up its great i did all this when i took out the fog light grills. This also explains how to get to the fog lights. This write up should be sticky IMHO.

I wonder if i did this removel and with my lower grill mods if it would net more air in there?
 

·
BLOODY ADMENSTRUATOR
Joined
·
7,554 Posts
Scarbrs said:
Thats a good question King.
I love this write up its great i did all this when i took out the fog light grills. This also explains how to get to the fog lights. This write up should be sticky IMHO.

I wonder if i did this removel and with my lower grill mods if it would net more air in there?
I was wondering the same thing. The lower left grille is a natural for air intake. Water shouldn't be a problem as the air must travel up to the filter. What moisture does get through, the filter will trap.

This engine will really benefit from better air volume. the colder, the better.
 

·
Registered
Joined
·
375 Posts
I did this as well, and removed the lower plastic grill by the fog. The Silencer is HUGE. It is actually 2 pieces. What I did was removed (took a hack saw to it) the baffle/silencer part, and cut it away from the inlet tube - then reinstalled it. The result is a much better path to get air into this thing and there are now 3 large holes in the inlet tube for air to flow into the filter box.
Hard to describe w/o pics (sorry). If you remove your lower plastic grill next to the fog light (I did easily), cold air flows directly into the area where the silencer was/is - I'm still trying to figure out why the factory would put the plastic piece there to block airflow...
anycase, I have some more throttle grunt, and along with the Borla cat back - it sounds great (but still quiet unless you are WOT) at least it sounds like a V8 now!
Waiting for EG to make the lower mesh pieces to match my grill.
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #8 ·
Glad you guys like it.

II Kings: the air will now come in from the hole in the body, which is about 3" higher than before. This is great for people who live in areas that flood.

That hole is a BIG hole, your car now sucks air like a toilet bowl when you flush it. You can pop out the black lower grilles (I'd do it just to make the car look better and less plasticky) but I'm not gonna add a tube because I am not a believer in RAM AIR for a daily commuter car. I don't want leaves and water sucked into my intake, its not worth it.

Maybe for brake cooling ducts...hmm... :cool: :D
 

·
Registered
Joined
·
2,719 Posts
Thanks, weather permitting, I plan to do this, I already have the TrueFlow in. pre production cars had brake cooling ducts. I am waiting for the mesh inserts for the lower grills to cover this.
 

·
Registered
Joined
·
2,719 Posts
One thing to ponder, why would DC go to the trouble of putting in a HP robbing silencer which cost money rather than have nothing there. Imagine the cost savings over 200,000 cars if they left the silencer off. They cut costs with cheap carpet, why not here, this is something we would not even know if they left it off un like the carpet.
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #11 ·
Because of noise regulations that they have to comply with...but we don't. ;)

You're right about the carpet though, coulda spent less time engineering the silencer and given us something better than that mouse fur!
 

·
Premium Member
Joined
·
1,010 Posts
right

Right so if we take the silencer out will that void the engine warranty?
 

·
Registered
Joined
·
27 Posts
He's talking about EPA noise regulations. Shouldn't be any implications to the engine warranty from this.
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #14 ·
If the dealer has the audacity to void the warranty with that...tell them the factory didn't install one. Considering the aftermarket CAI kits are legal, and attract way more attention from the dealer, I just don't see this being a problem. Don't worry, the dealer will never notice it missing, or care if they do.
 

·
Premium Member
Joined
·
1,010 Posts
ok

Yea i was thinking that they wouldnt see it but what if there is kind of engine trouble and they try to use that as the reson.
Also besides getting more cold air in there what will it make the engine sound like. will it have that sucking sound?
 

·
Registered
Joined
·
2,719 Posts
I agree the tech will never know it's missing if something is amiss. If there is a problem, assuming it's drivable, the induction noise (only at wot??) would alert the svc. mgr. I found a trunk exhauster in the wheel well when I did the rear mud flaps, would never have known it was sitting there and surely the dealer would never have found it.
 

·
Registered
Joined
·
375 Posts
I removed my silencer, and I have the Borla exhaust, it's still quiet, but it does breathe better now. The cabin on this car really does a great job of silencing the outside noises - you won't hear the 'sucking' sound unless your standing by the airbox and you rev.
 

·
Registered
Joined
·
2,719 Posts
I wish you guys would stop giving me more things to do that I never thought of, now it's one more project (does it ever end). Oh well, I have to wait til the temp is above freezing, can't wait to get started. 5.7, how do you like the Borla, did you get the Mopar version through the dealer.
 

·
Registered
Joined
·
375 Posts
II kings, I do like the Borla alot better with the silencer removed. It's still a very quiet system at idle and cruise and sounds like a V8 under WOT now. The 3.5 tips look great as well. If your still trying to keep the car classy - the Borla is a great setup. Mine is the Borla, not the Chrysler version.
Now get out there and tear that silencer apart!! You'll thank yourself!
 
1 - 20 of 91 Posts
Top