is this a good buy? im going to get some brand new gxp 13 inch rotors for 100 bucks i just bought some ss lines for 30 and i sent them a message if they would sell the kit without the lines and they said yes for 200 plus shipping what do yall think?

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TOP SWAPPED-LS6springsXPcam3.4MPS-SD'sCustomDHPtuneMsdCustom painted/polished genV SSCsGXPforged alcoasSPOgrilles/spoiler/SElip/GMPPhandling
14.02@100 2.294-60'
L32Swap 13.7@102 O.o

ZZP lists the GXP brakes has 12.7" rotors. Don't know if it's a good idea to purchase the rotors. However the brake upgrade to my GXP's was one of my most favorite mods. The car acts completely different without them. Wbody's should yeild the same results.

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Why have more money than brains? Cuz RACE CAR :

You're better off using the GXP caliper mounting brackets with those rotors since they aren't quite 13 inches.

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Bright Red 2008 G8 GT

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so the rotors on the site are really 13 inched? i thought they were 12.7s like the gxps...well are they still worth it? my friend has them and they look massive lol

-- Fri Jun 17, 2011 12:41 am --

inches*

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TOP SWAPPED-LS6springsXPcam3.4MPS-SD'sCustomDHPtuneMsdCustom painted/polished genV SSCsGXPforged alcoasSPOgrilles/spoiler/SElip/GMPPhandling
14.02@100 2.294-60'
L32Swap 13.7@102 O.o

Purchase the rotors threw the wbody store to garrentee a nice fit or buy a used set of GXP brakes My .02

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Why have more money than brains? Cuz RACE CAR :

If these are truly 13" brake upgrades,then I will have a set of single piece baer rotors up for sale after this weekend if you end up purchasing this setup...

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2009.5 SBM G8 GT
November 2011 Car of the Month

I purchased the "W-Body Store 13" brake upgrade kit", aka, CTS brakes, three years ago. They work fine, EXCEPT, you need washers to space the caliper bracket or you will be rubbing your brake shoe slider/retainer.

I purchased rotors seperately, using the GXP as my application. I bought them from ROTORPROS. They are centric blanks, they can drill them if you want. Back then, I had almost no option for a replacement fit rotor. Now, there are plenty of options. You can use a stock GXP rotor without problem. Brake pedal WILL FEEL THE SAME with these, as long as your bleed port is on the top side of your caliper.

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T66 Turbo,3" downpipes, oversized A2A,Stg3 heads/cam,hv3,built trans,bilstein struts,ssc springs,gxp brakes,pace car spoiler(1of3??),lots more.. dyno'd @ 421WHP~13lbs boost on OLD setup. New = ???

U bought the gxp set or the 13 inch ?

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TOP SWAPPED-LS6springsXPcam3.4MPS-SD'sCustomDHPtuneMsdCustom painted/polished genV SSCsGXPforged alcoasSPOgrilles/spoiler/SElip/GMPPhandling
14.02@100 2.294-60'
L32Swap 13.7@102 O.o

^^ Updated post..

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T66 Turbo,3" downpipes, oversized A2A,Stg3 heads/cam,hv3,built trans,bilstein struts,ssc springs,gxp brakes,pace car spoiler(1of3??),lots more.. dyno'd @ 421WHP~13lbs boost on OLD setup. New = ???

They drill them after they have been cast???? I would never do that...

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2009.5 SBM G8 GT
November 2011 Car of the Month

No idea, I was told when I ordered them, Centric only had "blank" casts. They drilled them for me free of charge due to the error. I have been using them for a while now without any complaints. If you read up on cross drilled rotors, you'll see they are not cast with holes already in them, they are milled/drilled using a special formula/location to avoid human error. However, there are companies that will slot/drill a rotor any way you want to fit your requirements. It would be unsafe if I had drilled them myself without any knowledge, but I trust the company, and nothing has made me believe they are of poor quality or are dangerous to use.

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T66 Turbo,3" downpipes, oversized A2A,Stg3 heads/cam,hv3,built trans,bilstein struts,ssc springs,gxp brakes,pace car spoiler(1of3??),lots more.. dyno'd @ 421WHP~13lbs boost on OLD setup. New = ???

I am just surprised they would drill on blank rotors since it structurally weakens the metal around it and makes it prone to cracking and failure. That's also not mentioning that you lose surface area when you do this (hence, going with larger rotors to make up for this) so it is probably better to go with blanks. Cross drilled/slotted rotors are more for autocross/track use than everyday street driving.

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2009.5 SBM G8 GT
November 2011 Car of the Month

I agree 100% with everything you said Roger. I'm pretty sure the holes are cast into the GXP rotors, so if you must have the holes then go with them over the drilled Centric blanks. You can request dimpled rotors where they "drill" a rounded bottom hole about an 1/8th inch deep. That type of drilling won't cause the metal to crack around the holes since it doesn't go all the way through the rotor. They still have the look of drilled rotors without the possibility of stress cracking around the holes.

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Bright Red 2008 G8 GT

Mods: DRCUSTOMPARTS Center Gauge Bezel
Superchips ECM/TCM Tune- Volant CAI
Solo Axlebacks - HID's
Holden V8 Badges
My Website

Damnir is right the guy use to drill them.. He may still do it. I run stock rear rotors for my 05 that were drilled by him .. He drilled them to match the GXP front rotors.

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Never argue with an idiot, he will drag you down to his level and beat you with experience.