C5 modernization
This has probably been asked before, but I just bought my first C5, and I absolutely love it. I'm over my fear of driving when I'm behind the Wheel. However, I'm looking to personalize my baby, starting with some modernization..i.e: upgrading sound system, adding backup camera, ect.
I'm asking because I'm looking at parts and would like your guys input of your own projects and parts used. I'm a little nervous because if I go out and buy a part, it might be non compatible, hoping to hear from ya.
Cheers.
Last edited by Pounder; Nov 6, 2018 at 09:35 PM.
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Regarding the headunit, these are basically the main options available. If you want to keep the Bose infrastructure, Option 4 is the way to go.
- Replace just the headunit, leaving the rest of the system intact using
- (this one preserves the RAP feature)
- Keep the headunit, but replace everything else adding a multichannel external amp driving new speakers through new wires by using
- Replace just the 4 twiddlers with 2-way coaxial speakers leaving the rest of the system intact
- Combine 1 and 3
- Take everything out and replace all from scratch
That being said, without a doubt, the easiest and least expensive way to upgrade the system with the more bang for your buck is new speakers that can be bolted on in place of the factory ones, keeping the rest of the system intact.
The C5 OEM speakers do not include any real tweeter. Bose used 4 plain-cone (paper) speakers to handle high and mid frequencies and called them "twiddlers". That's why you can make a big improvement by replacing them with a 2-way coaxial design.
OEM C5 Speaker Sizes:
-Front
Twiddler: 3.5"
Subwoofer: 8"
-Rear Twiddler
Coupe: 6.5"
FRC/Z06/Convertible: 5.25"
For bolt-on speaker upgrades, get 3.5" 2-way coaxial speakers to replace the doors' twiddlers and 2-way coaxials of the right size for the rear. Don't touch the OEM subwoofers.
A quick search produced this:
JL Audio Evolution™ C2 Series 2-way car speakers:
- C2-350X (3-1/2")
- C2-525X (5-1/4")
- C2-650X (6-1/2")
Not only they are from the same manufacturer, but they all belong to the same line. This should reasonably assure you they have the same timbre.
You are going to need as well. One kit will do both rears.
Independent confirmation that upgrading the 4 twiddlers makes a noticeable and worthwhile upgrade.





MGW shifter w/ lower box + dynamat over tunnel
Radioflyer headlights
LED taillights
swap out speakers for higher end + dynamat/sound deadening in doors/behind seats
Swap out head unit for DD or new stereo w/ bluetooth mic
Leather replacements for shift boot/parking brake
Steering wheel swap
seat swap
wheel swap/upgrade to C6 style or 18"s front/19"s rear
lowered some on stock bolts
Rear tray/partition - particularly on FRC's or Z06 models
These are pretty much the most significant mods you can do to "modernize" a C5 IMO - and I've done some myself (headlights/shifter/dynamat/stereo)
Enjoy!
Last edited by C5Dobie; Nov 7, 2018 at 12:27 PM.
PS. I did not pay anything close to the $419.99 in that ad.


Modernizing the look would be lighting, both interior and exterior, to HID and LED.
1. Radio Flyer BiXenon headlights
2. RF LED fogs
3. RF exterior/interior LED kit
(Yea, I like Georges products
)For drivability and performance
c6 shifter, swaybars, shocks, etc
I suppose you could call the audio system either a creature comfort or convenience if you get one that supports Nav, XM, and or phone inputs.
Last edited by aj98; Nov 7, 2018 at 09:33 PM.


















