EB847

the ones at the top are just like the oem ones that came on my 02 c2.

the middle are what i bought at the local dealer for $11.41 ea. those are the gt3.

the ones in the bottom are the expensive gt2 euro or gt3 cup depending on who you ask. they are reported to be extremely effective but more than what i needed for my dd with occasional track days.

see link: http://e-partssales.com/Merchant2/merchant.mvc?

needed or not, why wouldn't everyone buy and install in 10 min the gt3 ducts for that price?!

himself

It looks like the top are 996 stock (which are the same as MKI GT3), but I haven't run them in so long, they might actually be 996 GT3 MKII ducts. The second one looks like 997 GT3 ducts to me. I don't know what the bottom ones are, but they are close to the 996 Cup ducts, but are not the current ones. Maybe they are older versions.

Here are all the part numbers for those that are interested:

Brake Ducts [Front]Brake Ducts[rear]As for brake cooling, you will get some additional cooling from the front GT3 ducts, but your front nose will affect air flow to them. As you can see, there ins't a huge improvement in size between #1 and #2. But, the GT2 ducts are HUGE. Almost twice as big, extending a full inch lower than the GT3 ducts. You will definitely rub on speed bumps and anything low. AND if you go off track, they turn into shovels, grab dirt, rocks, and grass and snap off. A really quick way to lose $250. IMO, you should stick with the GT3 ducts.

Also, you won't benefit (much if any) from rear brake ducts. IIRC, your undercarriage will not flow air to them (and I think they evantually took them off the GT3 and Turbo, and only recently put them back on the 997s). Note: if you look at the undercarriage cover for a turbo, you will see air guide slots for the rear brake ducts. Without them, the air simply passes by (instead of into) the rear ducts. Also, given the size differential between front and rear, you will gain more by cooling the fronts a lot more, than by cooling the rears a little more.

For my application, the best upgrades for stock calipers using aggressive pads turned out to be:
GT3 air scoops [GT2 are too big]
GT3 liners
PFC dimpled rotors
Castrol SRF [or Motul 600/660 if bled frequently]

For endurance pads, there is little need for the GT3 liners.

I haven't visited my brake setup in a while, so this info may be outdated or just plain mixed in my head

-td

Ahmet

What I want to know is the type of duct the one at the bottom of that picture is? Anybody know, part #s perhaps?

Ahmet

That makes it sound like the bottom duct is a GT2 part? I have a friend who installed identical looking ducts on his 996 C2, and swears they were around $60 for both. If that were the case, I'd order them today... Also, you say GT3 fender liners, but it appears to me that you're running stock C2 liners that are trimmed by the frame rails, which then feed another set of ducts, which a stock C2 does not have, and I'm guessing this is what you're referring to when you say the GT3 fender liners?

All this makes me wish/wonder if I should just pick up a GT3, the upgrade/part swap game gets old quick...

Ray S

I took this picture and the "ducts" in it are mine. To clear up the confusion they are......

* Stock 986/996
* Stock 996 GT3
* Stock 996 GT3 Cup

FWIW I run the GT3 ducts on my 996 and the Cup ducts on my 986. I can't remember the pricing for all of them but I do remember that the Cup pieces were stupid expensive...

I have heard (have not had to try this yet) that the 997 Cup versions are much less $$ that the 996 version but will fit the 996. This is an internet rumor that I have not verified.

himself

If you read the entire thread, you will get the gist of the parts and install. There are separate air guides for the GT3 that reside in the fender. You have to "configure" the fender liner and radiator guides to work [which could be done with the GT3 fender liner].

The mega-brake-ducts pictured (bottom of the 3) are not stock for the 996 C2, they actually appear to be the GT3 RS street version to me [PN 996.341.[117/118].92]. The GT2 version looks more like the stock duct with another piece riveted on. The middle ducts have a corresponding 996 part, but there is no reason to pay the extra premium when the 997 part works and are cheaper. [This is the part virtually everyone is using now]. FWIW, Pelican shows the 996 GT3 part as $30 per side, whereas the 997 part is $11 per side.

-td

jumper5836

I did this a year ago, put 997 GT3 ducts on the front.
I noticed that the wheel weights to balance the wheels do not fall off anymore. I used to tape them on but now there is no need to.

Ahmet

I have the 996 GT3 ducts in my C2 (along with the rest of the suspension). I actually don't have any issues with the brakes on Pagid Yellows and ATE Super Blue fluid, but if those ducts really were under $100, that's what I would've gone with. Even at $250, I have to wonder if they'd be worth it considering how much they may save on rotor/pad life...

The radiator pass through modification was particularly appealing, as I like the idea of keeping some of the air going through the radiators from ending up under the car as well.

Anyway, I think I'll stick to keeping things as they are. If I could sell my 996 at a reasonable price, I'd like a GT3, though I have to say the C2 is a marvelous car, and I'm enjoying it thoroughly for the time being.

BTW, Ray and Td, thanks for all the part numbers and pictures. I appreciate reading about different set ups and comparisons.

iLLM3

Okay thread revival...

This past weekend at Thunderbolt I was talking to a guy with a GT3 cup, within the convo we got into brake ducts and he said get a set of the 997 cup ducts which are 20 dollars a piece, since the 996 variants were like 250 or something crazy... He said it was not a mistake and they still sell them?

Later on that day I ripped off my rear brake duct hitting a gator too hard (I guess one wheel went off into dirt a tad and the height difference caught it) so now i'm looking for options... I'm seeing my stock GT2 rear ducts are actually the best of the best? Or one of them but just hang low from the research i've done.. So are these indeed the gt3 cup ducts? I'm so confused lol

And the 997 cup ducts I was going to pick up for them being so cheap, but it seems as if the stock 996 gt2 ducts are really good , and that there is no need to switch? I never once had any brake fade or issue though..

Holger B

The bottom duct in that photo is what comes stock on the GT3.

The Cup duct is the same thing, but with an extra section riveted on that makes it deeper.

There are threads & photos about this on the GT3 board.

CWay27

I solved the problem permanently but it did cost a little more than just brake ducts.... although I do have the cheap 997 GT3 brake ducts.

007DT

So what is the part number for the Cheaper 997 ducts?

CWay27

I got mine from sunset for a little under 10.00$ each side

#997.341.483.92
#997.341.484.92

BTW I'd like to see pictures of your car. Like the 007 theme

Apex996

Got mine from local dealer for $16 a PAIR.

Pics of brake ducts on my 996 blog:
http://apex996.blogspot.com/

- Bill

Ray S

The ducts in you picture look almost identical to the second set of ducts in this picture.

If so, they are significantly smaller than the Cup ducts.