I have been reading threads on here and others where people have used GT2,GT3 and 997 Brake Cooling Ducts (amazing how hard it is to find any of those parts anymore).

I was wondering if any of the other wheel liners fit our 996T without modification. Looking primarily for a bit more room in the wheel well for the 315's in the back.

Any impact to the lack of vent's on the front GT2 liners that the Turbo's have if used?

 

I have 996 GT2 wheels on my 2003 C4S, which are 18x12 in the rear with 315/30/18 tires. No issues with fitment whatsoever, and I have RUF lowering springs.

 

I have GT2 front brake cooling ducts, GT3 rears on mine, on stock wheel liners.
They were not "hard to find" at all, just one call to Suncoast.

What wheel size are you using? Is your car suspension stock, or lowered? The only problem in the rear are the turbo hoses, they run pretty close to the lower edge of the rear wheel liner (obviously not an issue in a C4S). Make sure the inner lip of your tire DOES NOT rub there, or it can get expensive. Don't ask me how I know this.

 

I have stock wheel sizes for street but 235/40/18 FR and 315/30/18 R for Track. Getting a little rub on the liners but my shocks are shot - so I think this is caused when I run up on the curbing.

I was wondering if the GT2 liners had more room in them for larger wheels/tires.

Regarding the part numbers; there are a number of threads that list several options for the brake ducts..almost all of them are unavailable except the GT2/GT3.

 

7mm spacers on the rears will eliminate your problem for a lot less than the GT2 liners. That's what I did.

 

Thanks! I'll look into it. W/new suspension coming - it will probably be required.

What spacers did you use?

 

H&R spacers. You could probably get away with 15mm ones as long as you roll the rear fenders. Remember to buy the longer lug bolts to compensate for the spacers.

 

Not sure I want to roll the fenders. Thanks for the advice.

 

Just roll the inner lip. Easily done, not seen from the outside at all. Got it on mine.

 

good idea to change out the rear bracket/support along with the liners. I have 12" BBS e88's shod with 315 mpsc didn't want to deal with spacers. also needed to roll the fenders no big deal using the eastwood tool.

this is what I needed to roll the fenders, if my memory is correct the spacer was needed to get the extra extension from the adjustable arm of the tool along with the added fender washers.

 

So you did replace the liners and brackets w/GT2?

 

you might try and use a heat gun to heat up your liners and use a baseball bat to manipulate the area needed for clearance as it just varies from car to car. I ended up swtiching out my rear liners and lower rear sub bracket to GT2 version to get the clearence I was satisfied with.

sorry, I don't have the part numbers on hand let me know if you need them and I'll look them up for you.

 

Please post the part numbers. I assume the rear GT2 liners are not a direct drop in on a 996tt but need GT2 rear sub brackets (whatever those are?) as per your post above. I am curious about the part number for the brackets. It's not really clear in PET what is needed.

 

"you might try and use a heat gun to heat up your liners and use a baseball bat to manipulate the area needed for clearance as it just varies from car to car."


First time I heard of using a baseball bat to make adjustments to a Porsche. But I did once see a guy adjust a windshield on a different car... not good.

 

If it is rubbing on inside, then rolling fenders won't help. The rubbing will not occur in normal street driving. But, on the track, under load in a turn, the tire will flex and rub on the inside with 315 tires. Offset will matter. But, I have 3 sets of wheels and all three will do that. Have not tried GT2 liners.