Speaking of a GT2 front bumper conversion... as mentioned earlier I have the new OEM ductwork and coolant lines for it, but not the brackets to rotate the radiator. The part were given to me by the PO, and he "never got around to it".

So my question is can anyone tell me the correct part numbers for whatever brackets are needed to tilt the radiator forward? I have been searching all of the part websites and the Porsche Classic Parts catalog, and for some reason I cannot locate them. I keep finding the stock brackets for the TT, not the GT2. Maybe I'm looking in the wrong place? Attached are a few pics of the front end with the bumper and other things removed to make more room, (while I was there I cleaned the leaves and cigarette butts out of the radiators).

Here are the parts I have on hand:
996.575.141.30 Air Inlet
996.575.325.30 Air Outlet
996.106.621.80 Coolant supply line
996.106.625.80 Coolant return line

Any help would be appreciated. Thanks much,
Steve

 

Steve, the part numbers for the Lower radiator mounts to properly angle the center radiator are:
996-504-523-30
996-504-524-30
They are about $400 each. Some member's have had luck bending the existing brackets to the correct angle. I'm still not sure what I'm going to do regarding those parts. What are you doing for a bumper?
Howard

 

For just brackets you will want

996-504-523-30 / 996-504-524-30 Left and right lower side radiator brackets
996-504-413-30 Radiator Bracket (Center Lower)
996-504-195-30 Radiator Bracket (Center Upper)
996-504-679-31 Spacer Sleeve for upper radiator bracket (x2)
996-505-773-32 Bumper support spacers (x2)
900-074-136-03 M8x80 bolt (x2)

 

Thank you guys for those numbers, that really helps.

By the way, if you've already done the conversion, are the part numbers I have for the coolant lines correct? I'm concerned about replacing them because they look like they're buried. Were they difficult to swap out?

Lectricman... Here are a few pics of my bumper. It was already on the car when I purchased it. Just the ductwork and plumbing were not installed. It came from Precision Porsche, and it's fiberglas. The finish is top-notch, but the fit is about 99%. It has an OEM urethane lip clipped into it.

I'll have to start searching out those parts so I can complete the ductwork and plumbing before the weather gets nice again!

Thanks again,
Steve

 

Steve, take a look at this post from Mike Kelly. Awesome wright-up and great info. Keep in mind that he didn't use many of the water lines in his parts list. He will explain later in the post. There's two or three parts to his post. Great info. Also, there's a lot of conflicting info on the GT2 coolant hoses to and from the center radiator. Some order the GT2 hoses(very expensive, well they're GT2) and cut them to fit, some replace the whole hose and some actually order the 997 center radiator hoses and cut them to fit. This is what I may do and at $40 each, it's a far cry from the nearly $375 GT2 hoses. Have fun!
Howard
https://www.6speedonline.com/forums/...rsion-diy.html

 

The part numbers I have for the hose are the same except the last two digits. 996.106.621.75 vs 996.106.621.80 Coolant supply line and 996.106.625.75 vs. 996.106.625.80 Coolant return line. By the way these are now listed at $270 & $290 respectively. Your numbers show discontinued. Yours are probably superseded numbers. However, if they are GT2 hose they will be too short to reach the hard pipe they're supposed to connect to and you'll need to come up with a hose coupler, bisect those pipes and extend them. I have a different solution with some 997 hoses that would work without a coupler and needlessly having another possible point of failure. They are not very difficult to replace.
Look at post #12 in this thread to see what I'm talking about: Upgrading Stock GT3 (996.2) Radiators to CSF Radiators (and other upgrades) - Rennlist - Porsche Discussion Forums

 

Here's an awesome tool for reaching those pesky hose clamps and reinstalling them:

 

Steve,

With some care you can just re-bend the stock turbo bracket to get the orientation correct. You will need to space out the bumper supports with this bracket


You will also need to remove the center bumper reinforcement plate that is on the stock turbo bumber behind the plate area.

 

Thanks guys, very helpful info! While looking through my stack-o-stuff from the previous owner, I did find the two tubular spacers 996.504.679.31 and the two bumper support spacers 996.505.773.32.

Hey Sanyata... would you be so kind and explain a little more how you used that 997 hose? Did you cut and splice it? When I crawl under the front of the car, I can hardly find where the hose goes into the bowels of the car. Maybe I have to take more things off to see where they go.

Thanks much,
Steve

 

The use of the 997 hoses eliminates any splicing and gives you a factory equivalate installation. When you have both the center radiator and brackets off, plus the ducting for the side radiators off the car, you will have fairly easy access and visibility. The hoses get attached to those hard pipes before you mount the center radiator and need to be aligned perfectly for them to "click" into the radiator fittings. You can dry fit them and the radiator without the clamps so you can move the hose around to align them up and click into the radiator fittings. Once you do that, use a white or silver marker pen to make an alignment reference line between the hoses and the hard pipes. Remove and re-install with the clamps on the hoses but centered on the hose and slide the hoses in place over the hard pipes. Then after you've hard mounted the radiator and clicked them into the radiator, slide the clamps in place.
Couple of notes: Note where I cut the hoses slightly into the curved section of the pipe. For these hoses to be long enough you need every bit of length so don't cut them too short. I used a small bench disk sander to straighten, clean up the cuts and trim the hairs off the cuts. Lastly, when I did my installation the GT2 horn bracket was backordered, so I had to apply some pretzel logic to the TT bracket to mount the horn. I've eventually got the GT2 bracket but haven't found the need to install it so don't know if it will work with these hose configurations.
Hope this helps.

 

I just left it stock and added CSF rads - seemed like a lot of expense for minimal gains.

 

Yep, for a long time I had the center radiator in the normal turbo angle. I mated the back half of the turbo duct to the front half of the GT2 duct to fit the bumper and had a screen underneath the center exit duct at the top of the bumper below the hood. But my OCD kept bugging me to have the proper, 100% oem GT2 installation that would support the proper aero for my 150mph runs, not that I've ever done that. When the lockdowns came, it gave me something to do, so I went for it.

 

The way I figured it was that the GT2 front cover is more attractive than the turbo one, so if the turbo could do 190mph and be fine with the OEM, it would be similarly fine with the GT2 front without the agro (and cost) of tilting the center rad up.

Now, that being said, if anyone has any data supporting a benefit to a full conversion, I'd be interested in seeing it.

 

Arguably, if you're sporting the full Monty with GT2 rear wing and front bumper as designed by the factory, you have the proper balance and downforce. If mixed and matched, not so much, especially if the front bumper is exhausting through the upper hood area. Then your downforce is outta balance. On a street car that's being driven responsibly, you'll probably never see the speeds to significantly experience that imbalance. At higher speeds, I'd venture that imbalance would become quite apparent. I'm pretty sure Porsche has the data showing the difference between the GT2 and Turbo aero package. Whether that represents a benefit to folks doing the full conversion is up to them. c'est la vie...

 

This gets us into the neat world of weight distribution as well - the GT2 is a little lighter on the front end, so likely needs a little more downforce at speed than the turbo does.