I just purchased a C4S/Turbo bumper for my '02 C2. However I noticed that the bumper sticks out about half an inch to three quarters of an inch from where the original bumper sits on the car.

Anyone know of any remedies for this?

I've already figured out a solution for fitting the front turbo bumper. I created three aluminum extension to hold the bumper to the under side of the car.

Thanks.

 

The C4S/Turbo has a wider rear end than the C2 so the rear bumper from one won't fit the other one...

 

Don from CapeCod has fit the rear turbo bumper on his C2. It is possible and others have done it, but it does require some modification. You should PM him for more info... However, I think you will have to re-route your exhaust since the turbo exhaust are a little closer together...

There is also a company from the UK which has already modified the OEM turbo bumper to fit C2/C4 applications.

Then post back here with your updates! I'm going to be doing the same upgrade this spring

 

Here's a good post on that...

https://www.6speedonline.com/forums/...5&pagenumber=1

 

The width is fine, it's just the end of the bumper that does not sit perfectly on the car.

I tried it myself this last weekend.

 

Here's a good post from Gator996:

As it has been shown, Factory TT Rear Bumper can be done.
Here are the caveats and some of what my research has been like.

History
I saw & spoke with ByDesign but the were very protective at the time with the install info. They would prefer you just drop the car off and pick it up. For alot of dough...never really went beyond intial questions.

Speedart sells a factory TT rear bumper that they have modified for a narrow body. I don't know what modifications they've done but I have a general idea about what SHOULD be modified so they might be worth checking out if you want to stay narrow (no welding) but want the rear turbo grills & exhaust position OEM.

Speedart sells the rear bumper in a complete kit with all needed fastners, etc. for a good price. They have distribution through design 911 in the UK. I found a small tuner shop in the backwoods of Georgia that also supposedly deals Speedart stuff. They talked the talk but never came through with some answers to questions I had or a final price so I ignored them in the end.

BTW, Design 911 now sells a narrow body to TT conversion as a kit (and as seperate pieces) so getting the side air vents, etc. actually should be relatively easy. It was through conversations with them that I purchased the C4s pipe extenders (OEM part) that saved me from fabricating parts to use the standard C2 exhaust but get the pipe ends in the right position for the Turbo bumper. On a turbo the exhaust pipes are closer together.

I also spoke with Don, who has done the conversion and supplied me with pics & part numbers through the Renntech.org site. He was pretty helpful but some of his part numbers were incorrect or simply not needed. in the end I didn't have to order any heat shields as the C2 shields work just fine (thanks Bob at foreign affairs!).

Don was right about the install process info he provided.
There are a couple caveats about using a factory bumper vs aftermarket that should be understood / decided upon:

1) The factory bumper will not have a flush finish with the quarter panels. The bumper can be used but it is SLIGHTLY wider than the quarter panels and rear lights. Its totally a matter of taste whether or not this is acceptable to the owner or not. I'm not crazy about it as obviously flush is desired, but then again it isn't noticeably bad either. What you gain in having a OEM part is offset with not having a flush finish. Stan just something to consider as Doncapecod had the same issue and did it. Might want to give Design 911 a call or e-mail and see if they know how Speedart modifies the bumper if you're concerned. I wasn't. Rob, if you're happy with the rear bumper you have I would suggest staying with it (unless you're going for the widebody project). Ultimately, I'm keeping this car til death and I'll do the widebody one day so I have the right bumper for it.

I think this is where I think the tuners like Speedart might (should) be modifying the bumper. I'm not sure how its done but this is the only place I can where a modification is necessary or could be done.

2) Other than that it was a pretty straight forward install. Definitely get the C4s pipe extenders as they are OEM and put the pipe ends in the correct position for the bumper. Don actually had his install guy fabricate some stuff for this but I found that they are easily available & inexpensive.

3) Don changed all of the heat shields and Foreign Affairs found that to be unecessary. He also forwarded the part numbers (for a GT-3!) which ended up being totally useless but that's besides the point. i think Champion is going to take them back for me (I hope). Anyways, without Don's info was invaluable to getting the job done so I only joke about getting the wrong part numbers on the shields.

4) Outside of that, Don recommended that I give the job over to a competent Porsche shop. I would agree wholeheartedly. I wouldn't even go to a general body shop, no matter how good they are. I think there was value in a race prep / street prep porsche specialist like Foreign Affairs. Bob, the owner, actually had his guys remove the bumper on his C4s to make sure about all of the fasteners and confirm what would work best. He'll go to any length to make sure his work is as good as possibly can be done.

Thanks Bob! (plus I got a chance to talk TPC superchargers & racing for a good bit.) My brother & I have known Bob & Co. for a many years (owned a '79 911SC prior) and for anybody in S Florida I would highly recommend them. Their approach to the install of the TPC can't be beat and Bob has either the first or second install ever done in his car.

Its the one that Deputydog took pictures of in the superchargers post.

Rob, if you've made it this far in this longwinded post...I didn't know about those events but I'm interested...I'll see if I can get free for the autocross.

 

Thanks evo_333 for the incredible information.

Looks like I'll be calling Aniazos in Santa Ana for additional information.

At least I'll have the front turbo bumper completed this weekend. I guess can wait on the rear bumper until after Christmas.