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Prothane 7-504-BL Polyurethane S/B or B/B Chevy Motor Mounts

SAME DAY SHIPPING! Most orders ship within 24 hours.

Specs
Sold in Quantity:
Pair
Material Type:
Urethane
MFG. Part #:
7-504-BL
Centerline of Holes:
2.63
Overall Height:
2.18
Overall Width:
4.49
Overall Length:
4.41
Notes
Distance from the back of the mount to thru-bolt centerline is 1.75".
Prothane 7-504-BL Polyurethane S/B or B/B Chevy Motor Mounts

Click image to enlarge

Please note the following about this product:

  • This item is sold as a pair.

Details

Reviews

Q & A

What's in the Box

Info

These black polyurethane motor mounts for S/B and B/B Chevy are much stronger than OE rubber mounts but still reduce vibration.

  • Limits unwanted movement thereby putting more power to the wheels
  • Tough like solid metal mounts without the vibration and noise
  • Resistant to oil, chemicals and road contaminants that typically deteriorate rubber

Customer Reviews

Rated 5 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
7
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Terry
Verified Purchaser
Verified Reviewer
South Lyon, Mi.

these motor mounts fit great! they also look great!

April 19, 2016
they fit great, look great, and makes the job of putting the engine in easer
Pros:
  • They Make The Job Better
Yes, I recommend this product.
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Chevy2mike
Verified Purchaser
Morris,al

Mounts worked just the way they were suppose to

November 04, 2015
Work fine
Yes, I recommend this product.
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Plyjunkie
Verified Purchaser
Bakersfield, CA

Nice quality mounts

October 08, 2015
Good quality
Yes, I recommend this product.
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Swampdog2
Verified Purchaser
Breaux Bridge, LA

These mounts are heavy duty.

June 27, 2014
After my modified 350 ripped the old stock Chevy and the replacement Anchor mounts apart. I went to these. When you hold them in your hand the weight alone tells you that you have a more substantial mount. I did have to ground the opening for the thru bolt about the thickness of the cad plating so the bolt would go thru.
Pros:
  • good choice over solid mounts
Yes, I recommend this product.
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Team57
Verified Purchaser
Brandon, MS, USA

Great price.

September 22, 2013
I found that for this product, Speedway was ten dollars cheaper on the product and I paid less for shipping.
Yes, I recommend this product.
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CHRIS
Verified Purchaser
CHINO HILLS, CA

EXCELLENT

May 06, 2011
GOOD QUALITY FOR MY 36 ROADSTER
Pros:
  • Durable
  • Easy To Install
Yes, I recommend this product.
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Aaggie
Houston, Texas

Motor Mounts

February 27, 2010
I tried to find heavy duty mounts at local auto parts and all they had was foreign made low quality parts. These are foreign made but are high quality and just what I was looking for.
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

7 questions : 7 answers

1 answers

is there front mounts made with a 3/8" forward offset?

1953
Chilliwack, BC, Canada
December 28, 2014

is there front mounts made with a 3/8" forward offset?

Answers

December 29, 2014
EricM
Sorry we do not offer an offset motor mount.
1 answers

will they work on a 89 chevy 305 older 23 t with speedway mounts welded in on frame. old owner sold motor and mounts with engine. .Putting car back together.

boilerman
Indiana, USA
November 18, 2014

will they work on a 89 chevy 305 older 23 t with speedway mounts welded in on frame. old owner sold motor and mounts with engine. .Putting car back together.

Answers

November 18, 2014
EricM
Yes this mount will bolt onto a Chevy 305 engine. These require a mount on the frame that is about 2 5/8" wide.
1 answers

what is the measurement between the ears?

November 27, 2011

what is the measurement between the ears?

Answers

November 28, 2011
Jason
This is 2-5/8" between ears, 4.406" over all length, 4.486" over all wide and 2.177" in height
1 answers

will this mount also work on a 4.3 L chevy block?

ed
philadelphia,pa
January 18, 2011

will this mount also work on a 4.3 L chevy block?

Answers

January 25, 2011
Waymon
The POLYURETHANE S/B & B/B CHEVY MOTOR MOUNTS Item #: 91018015, will mount to a 4.3 liter chevy block.
1 answers

Well these fit on the frame side of a 75 Chevy truck

July 07, 2011

Well these fit on the frame side of a 75 Chevy truck

Answers

July 12, 2011
John
These are the block mounted motor mounts common to most GM applications where the solid steel mount is on the frame and the cushion part is on the engine. For a “clam shell” style mount where the rubber part is on the frame side you will want to contact your local parts store for availability.
1 answers

Are the slotted holes on the side of the mount for a 1/2" bolt?

Lee
Poplarville, MS
December 09, 2015

Are the slotted holes on the side of the mount for a 1/2" bolt?

Answers

December 09, 2015
Eric
Expert
No these are for a 7/16" bolt which was normal for Chevy V8 engines which this mount fits. If you want to change to a 1/2" bolt I would think it could be done with some minor grinding on the slot.
1 answers

Are these mounts completely flat on the back ( engine side). I may need to use shims with them and need a flat surface on the back side.

john
United States
February 14, 2016

Are these mounts completely flat on the back ( engine side). I may need to use shims with them and need a flat surface on the back side.

Answers

February 15, 2016
Eric
Expert
Yes the back of these are flat and will work fine with a shim.
Page 1 of 1

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