Impalas.net banner
1 - 20 of 20 Posts

·
Registered
67 Caprice
Joined
·
4 Posts
Discussion Starter · #1 ·
I currently have the factory 4 piston brake calipers on my 67 Impala.

Are the "Single Piston Optioned" calipers a bolt on replacement for the 4 Piston Calipers, or will other modifications be needed?
 

·
Registered
Joined
·
216 Posts
Hollander book says 4-piston only on '68 but this is weird....

Caliper Assembly
yr........................interchange #
67.........................131
68 1-piston......132
.....4-piston....... 131
69-70...................132

131
: 4-piston type 5468555-4....R&L inner
.......................................5456479........R&L outer
Chev. Pas. 67-68

132: 1-piston type 5472814-3...R&L
Chev. Pas. 68-70


Hub & Drum assembly (including disc)
yr..............................interchange #
67 disc........................1294
68 disc ..1-piston.....1336
.............4-piston.........1294

1294
: 3933936
Chev. Pass. '67 disc brake
Chev. Pass. '68 4-piston disc brake

1336: 3986083
Chev. Pass. '68 single piston
Chev. Pass. '69-70 disc brake


The Power Brake cylinder assembly for disc brakes is the same for both years, part # 5463968

The Brake Master Cylinder is different for both years , '67 & '68
 

·
Registered
67 Caprice
Joined
·
4 Posts
Discussion Starter · #3 ·
Hollander book says 4-piston only on '68 but this is weird....

Caliper Assembly
yr........................interchange #
67.........................131
68 1-piston......132
.....4-piston....... 131
69-70...................132

131
: 4-piston type 5468555-4....R&L inner
.......................................5456479........R&L outer
Chev. Pas. 67-68

132: 1-piston type 5472814-3...R&L
Chev. Pas. 68-70


Hub & Drum assembly (including disc)
yr..............................interchange #
67 disc........................1294
68 disc ..1-piston.....1336
.............4-piston.........1294

1294
: 3933936
Chev. Pass. '67 disc brake
Chev. Pass. '68 4-piston disc brake

1336: 3986083
Chev. Pass. '68 single piston
Chev. Pass. '69-70 disc brake


The Power Brake cylinder assembly for disc brakes is the same for both years, part # 5463968

The Brake Master Cylinder is different for both years , '67 & '68
So basically I have the option of getting my current calipers stainless sleeved, new pistons/seals... or get a different hub.

Are there any aftermarket single piston "conversions" perhaps, I see plenty for use on drum spindles advertised.
 

·
Registered
Joined
·
265 Posts
The 1967 disc brake system that you have is relatively rare. I would definitely keep what you have and have them resleeved. To answer you original question: No, there is no "Single Piston Optioned" calipers as a bolt on replacement for the 4 Piston Calipers. The common conversions that use single pistons also use a smaller 11" rotor, designed for smaller cars. Your system uses the larger 11¾" rotors. It might not seem like much, but the difference is HUGE. You have a way beefier rotor, designed for your car. Here are your options:
1) Work with what you have (recommended).
2) The common conversions that use single pistons also use a smaller 11" rotor.
3) Wilwood or Baer brakes.
4) 1969-1970 Impala single piston brake set up. These also use the larger 11¾" rotors.
 

·
Registered
1967 Impala SS 427
Joined
·
46 Posts
I have a 1967 Impala SS 427 with the factory optioned 4 piston front calipers and yes, as Bigdog said they are very rare and desirable. I had a similar problem so rather than spend the money to rebuild them I purchased a pair of Wilwood 4 piston calipers. They have a set that are bolt on replacements. You will need new hoses as well. Make sure you box up and save the originals as once again, they are very rare and you want to keep them.
 

·
Registered
67 Caprice
Joined
·
4 Posts
Discussion Starter · #6 ·
I have a 1967 Impala SS 427 with the factory optioned 4 piston front calipers and yes, as Bigdog said they are very rare and desirable. I had a similar problem so rather than spend the money to rebuild them I purchased a pair of Wilwood 4 piston calipers. They have a set that are bolt on replacements. You will need new hoses as well. Make sure you box up and save the originals as once again, they are very rare and you want to keep them.
Which Wilwood Caliper kit is their bolt on kit?

Cheers.
 

·
Registered
Joined
·
1,267 Posts
Agree, box them up and save them as they are a desirable option as mentioned above.
 

·
Registered
1967 Impala SS 427
Joined
·
46 Posts
Snowman I cant find the receipt for them. I bought them in 2018. You can probably call Wilwood or email them for technical support and get the part number. I spent around $500 for them. I do recall that the bottom of the caliper mounting bracket needed to have approximately 1/8" ground off with a grinder as there was a slight clearance problem but other than that, perfect fit and awesome braking.
 

·
Registered
1967 Impala SS 427
Joined
·
46 Posts
Snowman, I found the receipt! Its exactly what I thought. GM used the 4 piston front Corvette caliper on these cars. I paid $488 for silver calipers(looks factory), and hoses. I don't remember if the pads were included or not. On my receipt it says "wilwood front caliper kit for 65-82 Corvette". Like I said, aside from grinding the slight clearance from the bottom of the caliper mounting bracket, these are a direct fit.
 

·
Registered
Joined
·
45 Posts
I have a 1967 Impala SS 427 with the factory optioned 4 piston front calipers and yes, as Bigdog said they are very rare and desirable. I had a similar problem so rather than spend the money to rebuild them I purchased a pair of Wilwood 4 piston calipers. They have a set that are bolt on replacements. You will need new hoses as well. Make sure you box up and save the originals as once again, they are very rare and you want to keep them.
I went through the same issue with the disc brakes on my 67 last year.
Tried in vane to gather enough parts to rebuild the originals and to no avail, (still looking).
So I rang Wilwood in California and spoke to a chap and he swore black and blue that there wasn't any caliper that would bolt straight up to the original mounts on a 1967 Impala.
I was told by some one on a forum that the D8-4 which as it turned out are a direct replacement for the 65-82 Corvette would fit but the chap at Wilwood said NO.
So for the time being I purchased a Wilwood kit and have replaced the brakes completely and are very happy with the result but are still looking for bits and pieces for the originals to be refurbished.
The only thing I had to change was the calipers in the kit out for units that have dust seals on the pistons, which is a requirement by law for us here in Australia.

I currently have the factory 4 piston brake calipers on my 67 Impala.
Are the "Single Piston Optioned" calipers a bolt on replacement for the 4 Piston Calipers, or will other modifications be needed?
No, single piston are not a bolt on replacement.
Only good for 69-70 years
If you want to use them you'd have to get a complete 69-70 setup and replace the lot over from what you have on there now.

Cheers
 

·
Registered
Joined
·
45 Posts
Hollander book says 4-piston only on '68 but this is weird.... (don't know why but they have chosen not to put "4 - Piston" next to the 67 year)

Caliper Assembly
yr........................interchange #
67.........................131 (131, same number as 68 4 - piston)
68 1-piston...........132 (later 68, mid year replacement or there abouts)
.....4-piston.......... 131 (same as 67)
69-70...................132 (132, same number as 68 1 - piston)

131
: 4-piston type 5468555-4....R&L inner (correct)
..............................5456479........R&L outer (correct)
Chev. Pas. 67-68

132: 1-piston type 5472814-3...R&L (correct)
Chev. Pas. 68-70


Hub & Drum assembly (including disc)
yr..............................interchange #
67 disc........................1294 (again 1294, same number as 68 4 - piston)
68 disc ..1-piston........1336 (later 68 mid year replacement or there abouts)
.............4-piston..........1294 (same as 67)

1294
: 3933936
Chev. Pass. '67 disc brake
Chev. Pass. '68 4-piston disc brake (3960230 '68 single piston disc brake assembly)

I hope that clarifies that for you.
Cheers.
 

·
Registered
Joined
·
216 Posts
Hollander book says 4-piston only on '68 but this is weird.... (don't know why but they have chosen not to put "4 - Piston" next to the 67 year)

Caliper Assembly

yr........................interchange #
67.........................131 (131, same number as 68 4 - piston)
68 1-piston...........132 (later 68, mid year replacement or there abouts)
.....4-piston.......... 131 (same as 67)
69-70...................132 (132, same number as 68 1 - piston)

131
: 4-piston type 5468555-4....R&L inner (correct)
..............................5456479........R&L outer (correct)
Chev. Pas. 67-68

132: 1-piston type 5472814-3...R&L (correct)
Chev. Pas. 68-70


Hub & Drum assembly (including disc)
yr..............................interchange #
67 disc........................1294 (again 1294, same number as 68 4 - piston)
68 disc ..1-piston........1336 (later 68 mid year replacement or there abouts)
.............4-piston..........1294 (same as 67)

1294
: 3933936
Chev. Pass. '67 disc brake
Chev. Pass. '68 4-piston disc brake (3960230 '68 single piston disc brake assembly)

I hope that clarifies that for you.
Cheers.
ahhh, mid-year replacement....
so they replaced the 4-piston with a 1-piston? or vice versa?
 

·
Registered
Joined
·
45 Posts
ahhh, mid-year replacement....
so they replaced the 4-piston with a 1-piston? or vice versa?
They replaced the 4 - piston with the 1 - piston and then carried the 1 - piston on through the early 70's

Can't for the life of me understand why they didn't just use the early 65-66 corvette front brakes on the 67 Impalas rather than what we have today, at least parts would be readily available.
I'm of the understanding that the 67 front disc brakes were used on other marks such as Oldsmobile etc same year, I have been to a Olds forum and spoken to them about part numbers of the calipers etc.

Cheers.
 

·
Registered
Joined
·
216 Posts
They replaced the 4 - piston with the 1 - piston and then carried the 1 - piston on through the early 70's

Can't for the life of me understand why they didn't just use the early 65-66 corvette front brakes on the 67 Impalas rather than what we have today, at least parts would be readily available.
I'm of the understanding that the 67 front disc brakes were used on other marks such as Oldsmobile etc same year, I have been to a Olds forum and spoken to them about part numbers of the calipers etc.

Cheers.
Hollander says (for 131 and 132):
Olds F85 - 1963 - 132

that's the only number out of my original post that interchanges
 

·
Registered
Joined
·
216 Posts
@jdjcorvette @BigDogSS @62BillT

just found these on Craigslist, posted less than 1 hr ago


4 piston calipers Delco Morraine - $100 (Coarsegold/Fresno)

Chevelle/ Impala 1967? Have these calipers that need somebody with patience..it’s apparently not me! Includes new rebuild kit plus extra rebuild parts. They have the lip seal that I got tired of trying to seal. I guess you need to poke them in slowly etc. I gave up and purchased new ones. The one rebuild kit was $200 plus. They are the big bore...new pistons seals dust covers. My loss your gain. 5455946 is the caliper number.
 

·
Registered
Joined
·
265 Posts
1) 1963 Olds F-85 did not have disc brakes. The first GM car to have disc brakes was the 1965 Corvette.
2) The 1965-1982 Corvette spindle will bolt-on to the 1967 Impala ball-joints. This conversion has been done with readily available Corvette parts.
 

·
Registered
Joined
·
265 Posts
I purchased a complete 1969 (B-Body) disk brake system from brake booster, master, brake valves, spindles with steering arms….. direct bolt in.
Larger bearings, no problem getting any parts.
I'm also running the same single piston disk brake system from a 1970 Caprice. As Bill says --> direct bolt in.
 
1 - 20 of 20 Posts
Top