LS1 rear brakes info and part numbers

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Dec 18, 2005 | 05:48 PM

Justins86bird

Thread Starter

TGO Supporter

Joined: Jul 1999

Posts: 3,838

Likes: 4

From: Another world, some other time

Car: 86 LG4 & 92 TBI Firebird

Engine: The Mighty 305!

Transmission: 700R4

Axle/Gears: 3.42

LS1 rear brakes info and part numbers

Hello fellow
F-body enthusiast! Below you will find a list of the parts with their
corresponding part numbers required to update an F-body 10 bolt disc or
drum rear to the 98-up LS1 disc brakes. There are several part numbers and
prices not listed and I will update the chart with them as soon as I get them. I
am estimating $15-$30 for those parts not yet priced. As you can see, the total
price for the conversion will be approx. $550, not including pads. I chose Hawk
HPS pads ($55) to match my 1LE HPS pad up front, but there is a wide range of
prices and different pad mats starting from $30. Also, hooking the parking brake
up to the earlier F-body style will require some fabrication. If you are
upgrading a drum rear, a new prop valve (approx. $50) may be required, depending
on the year of the vehicle. I hope to have pictures up shortly!! * Please
note that your local dealer may have much higher prices then I have listed, and
most likely will require that the GM parts be order over the web. **
Stainless steel flex hoses may be substituted for the GM rubber hoses and
slotted rotors may be subst for the solid rotors, but this will add to the cost
of the conversion. A NOTE ON CALIPERS-These calipers are
NEW GM/PBR calipers! I have found that the rebuilt units from
parts stores are approx. the same price before they add the core charge!
Since the GM calipers are new, there is no core charged when ordering them. They
also come with the caliper to caliper pin mounting bolts. As an added bonus, the
GM calipers will allow the installation of a 100% new rear braking
system.

There are several very good tech articles on upgrading brakes, including an article on how to modify the drum rear to accept the disc backing plates here: https://www.thirdgen.org/newdesign/tech/

Also, please visit this thread on thirdgen.org : https://www.thirdgen.org/techbb2/sho...ght=ls1+brake%

Please scroll down for parts chart
<TABLE border=1>
<TBODY>
<TD>Quantity Req.</TD>
<TD>Q x Price</TD>
<TD>Price each</TD>
<TD>Mfg. </TD>
<TD>p/n </TD>
<TD>description</TD>
<TD>Avail at</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$60 </TD>
<TD align=middle>$60 </TD>
<TD align=middle>GM </TD>
<TD align=middle>12455127</TD>
<TD align=left>LS1 LH rear PBR caliper (NEW-NO CORE
CHARGE)</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$60 </TD>
<TD align=middle>$60 </TD>
<TD align=middle>GM </TD>
<TD align=middle>12455128</TD>
<TD align=left>LS1 RH rear PBR caliper (NEW-NO CORE
CHARGE)</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$61 </TD>
<TD align=middle>$61 </TD>
<TD align=middle>GM </TD>
<TD align=middle>10434796</TD>
<TD align=left>Rear LH backing plate with drum parking
brake shoes</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$61 </TD>
<TD align=middle>$61 </TD>
<TD align=middle>GM </TD>
<TD align=middle>10434797</TD>
<TD align=left>Rear RH backing plate with drum parking
brake shoes</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>2</TD>
<TD align=middle>$46 </TD>
<TD align=middle>$23 </TD>
<TD align=middle>GM </TD>
<TD align=middle>12456459</TD>
<TD align=left>Caliper mounting brackets </TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>2</TD>
<TD align=middle>$34 </TD>
<TD align=middle>$17 </TD>
<TD align=middle>GM </TD>
<TD align=middle>10424968</TD>
<TD align=left>Rear parking brake cables</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$4 </TD>
<TD align=middle>$4 </TD>
<TD align=middle>GM </TD>
<TD align=middle>10289539</TD>
<TD align=left>Rear LH parking brake bracket</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$4 </TD>
<TD align=middle>$4 </TD>
<TD align=middle>GM </TD>
<TD align=middle>10289540</TD>
<TD align=left>Rear RH parking brake bracket</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>2</TD>
<TD align=middle>$48 </TD>
<TD align=middle>$24 </TD>
<TD align=middle>GM</TD>
<TD align=middle>22163484 </TD>
<TD align=left>Rear brake hoses (to calipers) w/ banjo
bolt</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$0 </TD>
<TD align=middle> </TD>
<TD align=middle>GM</TD>
<TD align=middle> </TD>
<TD align=left>Rear brake hose (chassis to
axle)</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$0 </TD>
<TD align=middle> </TD>
<TD align=middle>GM</TD>
<TD align=middle>N/A</TD>
<TD align=left>Prebent LS1 metal brake line (mounted on
axle)</TD>
<TD align=middle>Salvage yard</TD></TR>
<TR vAlign=bottom>
<TD align=middle>4</TD>
<TD align=middle>$3.75</TD>
<TD align=middle>$15 </TD>
<TD align=middle>GM</TD>
<TD align=middle>12530697 </TD>
<TD align=left>Caliper guide pins</TD>
<TD align=middle>GM</TD></TR>
<TR vAlign=bottom>
<TD align=middle>2</TD>
<TD align=middle>$124 </TD>
<TD align=middle>$62 </TD>
<TD align=middle>Aimco </TD>
<TD align=middle>55050</TD>
<TD align=left>Rear rotors with parking brake
drum</TD>
<TD align=middle>AutoZone</TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$15 </TD>
<TD align=middle>$15 </TD>
<TD align=middle>Brakeware </TD>
<TD align=middle>H5927</TD>
<TD align=left>Anti-rattle pad springs and caliper pin
boots</TD>
<TD align=middle>AutoZone</TD></TR>
<TR vAlign=bottom>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=left> </TD>
<TD align=middle> </TD></TR>
<TR vAlign=bottom>
<TD align=middle>Total</TD>
<TD align=middle>$532 </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=left> </TD>
<TD align=middle> </TD></TR>
<TR vAlign=bottom>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=middle> </TD>
<TD align=left> </TD>
<TD align=middle> </TD></TR>
<TR vAlign=bottom>
<TD align=middle>1</TD>
<TD align=middle>$55 </TD>
<TD align=middle>$55 </TD>
<TD align=middle>Hawk</TD>
<TD align=middle>HB250F653</TD>
<TD align=left>LS1 HPS rear pads</TD>
<TD align=middle>ThunderRacing.com</TD></TR></TBODY></TABLE>

Attached Thumbnails

LS1 rear brakes info and part numbers-ls1brakes2.jpg

Last edited by Justins86bird; Dec 18, 2005 at 05:52 PM.

Dec 19, 2005 | 10:09 AM

jtmiller92

Senior Member

iTrader: (42)

Joined: Jun 2001

Posts: 929

Likes: 10

From: Nicholasville,KY

Car: 1992 Camaro RS

Engine: 415ci LS3

Transmission: T56

Axle/Gears: 3.89

Cool, Just what I was needing. You wouldnt happen to know the part #'s for the caliper bracket to backing plate bolts would you?

Dec 19, 2005 | 11:05 AM

jtmiller92

Senior Member

iTrader: (42)

Joined: Jun 2001

Posts: 929

Likes: 10

From: Nicholasville,KY

Car: 1992 Camaro RS

Engine: 415ci LS3

Transmission: T56

Axle/Gears: 3.89

Oh, also curious as to where you bought your Hawks Brake Pads for $55.00. Thunder has them for $66.99, anywhere cheaper to get them.........jt

Last edited by jtmiller92; Dec 19, 2005 at 01:20 PM.

Dec 19, 2005 | 12:40 PM

89 Iroc Z

Supreme Member

Joined: Aug 2001

Posts: 2,136

Likes: 2

From: Costal Alabama

Car: 1989 Iroc-Z

Engine: 350, ZZ4 equivalent

Transmission: Pro-Built Road Race 700R4

Axle/Gears: 3.23 Dana 44

Nice parts list Justins86bird. Has anyone posted a definitive solution to make the LS1 parking brake lines connect to the factory parking brake setup?

Dec 25, 2005 | 10:24 PM