stock rotor size
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From: buhler,ks.
Car: 1989 trans am
Engine: 402 ls
Transmission: TH350
Axle/Gears: 9inch 3.50 gear
stock rotor size
going to change my front rotors which are the 10.5. the parts store said they have optional hi-perf rotor which is 11-3/4 what did these come on? and i would assume thay use different calipers. any info would be helpful thks
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Joined: Mar 2003
Posts: 4,771
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From: Florida
Car: 1987 Black IROC-Z (SOLD)
Re: stock rotor size
Stock size is 10.5 dia on 99 44/100 % of 3rd gen cars the exception is 1LE & B4C cars haviving the 11.75 Dia. If your car is stock you CANNOT use the larger rotor size.
Supreme Member
Joined: Mar 2003
Posts: 4,771
Likes: 15
From: Florida
Car: 1987 Black IROC-Z (SOLD)
Joined: Aug 1999
Posts: 19,282
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: stock rotor size
Here's a link that discusses both front and rear:
https://www.thirdgen.org/forums/faq-...iscs-89-a.html
Good luck.
JamesC
https://www.thirdgen.org/forums/faq-...iscs-89-a.html
Good luck.
JamesC
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