Mustang II Front Springs, 300 lb. Spring Rate, 13.5 Free Height
Mustang II Front Springs, 300 lb. Spring Rate, 13.5 Free Height
Speedway Motors

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#917230-300

Mustang II Front Springs, 300 lb. Spring Rate, 13.5 Free Height

  • Feature a powder coated finish for increased longevity and corrosion prevention
  • Made to OEM specs with a 3.5" ID and 13.5" free height
  • Available in spring rates from 275 to 425, in 25 lb. increments, allowing you to fine tune your ride quality
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Rate:

300 Lb.

$147.99

/pair

In Stock

Garage Sale alternatives: from $115.99


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Product Summary

74-78 Mustang II, 74-80 Pinto, 75-80 Bobcat, Steel

  • Feature a powder coated finish for increased longevity and corrosion prevention
  • Made to OEM specs with a 3.5" ID and 13.5" free height
  • Available in spring rates from 275 to 425, in 25 lb. increments, allowing you to fine tune your ride quality
  • Features a square spring end for the upper hat side ensuring a flush fit for proper compression and alignment
  • Features a pigtail spring end for the control arm side, allowing it to be trimmed to fit your setup
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Key Specs

MFG. Part #917230-300
PositionFront
Spring Rate300 lbs.
Free Height13.5"
Inside Diameter3.5"
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Speedway Motors 917230-300 Details

Our Mustang II springs come in rates from 275 thru 425 and in 13.5” free height/length. They will require cutting to the necessary length on the majority of applications. For the heavier vehicles such as full size pickup trucks and fat fendered cars the spring rate used will normally be in the 350-400 range. With Small Block and automatic a common rate is 375 to 400 and with the addition of A/C or a big block you will need to compensate for the additional weight and go to the next higher rate. Frame boxing and plating, accessories, and fuel tank size all play a part in selecting spring rate. When vehicle is sitting at ride height ready for test drive the lower control arms should be parallel with the ground or pointing down at a slight angle on the outer ends. The springs will settle some in the first couple of hundred miles so allowance for this should be made.

  • Powder coated gloss black
  • 13.5" spring length
  • 3.50" inside diameter
  • Use the spring chart below to select proper rate

Use the following chart to select your rate:

  • 1200 lb. Front  End Weight = 275 Rate Spring
  • 1300 lb. Front  End Weight = 300 Rate Spring
  • 1400 lb. Front  End Weight = 325 Rate Spring
  • 1500 lb. Front  End Weight = 350 Rate Spring
  • 1600 lb. Front  End Weight = 375 Rate Spring
  • 1700 lb. Front  End Weight = 400 Rate Spring
  • 1800 lb. Front  End Weight = 425 Rate Spring

Speedway Motors 917230-300 Specifications

KEY SPECS
MFG. Part #917230-300
BrandSpeedway Motors
PositionFront
Spring Rate300 lbs.
Free Height13.5"
Inside Diameter3.5"
Material TypeSteel
FinishPowder Coated
ColorBlack
Diameter Big End4.6"
Diameter Small End4.6"
Spring Rate Range300 - 399 lbs.
GENERAL
Sold in QuantityPair
Progressive Rate SpringNo
Coil Spring End (A)Square
Coil Spring End (B)Pigtail
Wire Diameter0.58"

Ratings & Reviews

4.9

84 Reviews

Overall Assessment

The product, Mustang II suspension springs, have high-quality material and practicality. They are versatile for various vehicle models, like '53 Ford, '55 Studebaker, and '47 Ford and provide excellent ride quality. Users have complimented that they can customize the product according to their needs by trimming the spring, which improves lower control arm orientation and ride height. The springs offer a solution for front-end height issues, enhancing the appearance and driving experience. The product's superior features also include durability, safety, and affordability in contrast to competitors. Some customers wished they had chosen a different spring rate for a softer ride but overall, most users would repurchase and recommend them for their superior use and performance.

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4.9

84 reviews

5

77

4

6

3

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Most Liked Positive Review

5.0

Mustang 2 front coil springs

Chose the 400lb coil springs for my 1935 Dodge Business coupe. Coils were 2" taller than the existing coils that were cut to short. They raised the front of the car 5 additional inches. I feel they were the right weight rating for my car because the car just began to raise off the jack stands when they fully compressed as I attached the spindle. I will probably cut some off the coil to lower the car after driving the vehicle some. When I shorten the coil length, I will use the 1 to 2 rule. Example 1" shorter gives 2" drop. I will most likely start with 1/2" shorter coil length to drop 1" and monitor the change. Better to cut it once or twice or three times and get the stance and a-arms in there correct working angle. Nice powder coating and quick shipping.

Most Liked Negative Review

2.0

I would buy this product agin if needed

these springs gave me the perfect ride height ,but you must weight your car first [get your scales here at speedway] get correct weight springs !

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I would buy these again

5.0

2 months ago

Block

Illinois

Verified

They were exactly what they said. They were good quality.

Would Recommend

I would buy again

5.0

4 months ago

Rat rod

Omaha ne

Verified

Worked great and rides awesome

Would Recommend

I would buy again

5.0

4 months ago

Rat rod

Omaha ne

Verified

Worked perfect

Would Recommend

I would purchase again

5.0

6 months ago

Jes

Houston, Tx

Verified

Springs fit perfectly and created a great ride.

Would Recommend

51 Chevy Too Low

5.0

a year ago

Leroy

Tallassee, AL

Verified

Replaced front coil springs on 1951 Chevy sedan. Original springs installed were too weak.

Would Recommend

Mustang 2 front coil springs

5.0

a year ago

Asphalt Thrasher

Caldwell, Idaho

Verified

Chose the 400lb coil springs for my 1935 Dodge Business coupe. Coils were 2" taller than the existing coils that were cut to short. They raised the front of the car 5 additional inches. I feel they were the right weight rating for my car because the car just began to raise off the jack stands when they fully compressed as I attached the spindle. I will probably cut some off the coil to lower the car after driving the vehicle some. When I shorten the coil length, I will use the 1 to 2 rule. Example 1" shorter gives 2" drop. I will most likely start with 1/2" shorter coil length to drop 1" and monitor the change. Better to cut it once or twice or three times and get the stance and a-arms in there correct working angle. Nice powder coating and quick shipping.

Would Recommend

Yes I'd buy this product again

5.0

a year ago

Chevy truck

Indiana PA

Verified

It arrived as described work perfectly

Would Recommend

Yes I have ordered it 3 times use them alot

5.0

a year ago

Kirk

Sharpsburg ky

Verified

I use on 91 s10 with mustang 2 front end they do a great job

Would Recommend

Feel better than the old springs

5.0

2 years ago

Ted

Alabama

Verified

I put some stock Mustang II springs in my F100 front end. Within a year they were sagging by 3 inches. I put these 400 pound springs in to help keep the front end from dropping. The stance has been restored and it rides better now since it has more travel.

Would Recommend

Super nice front springs for my kit car.

5.0

2 years ago

Pat

West virginia

Verified

I wanted new full tension coil springs for ride and look and stability and I got it all at Speedway.

Would Recommend

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Showing 10 of 84 reviews

Questions & Answers

37 Questions • 13 Answers

I got a set of mustang ii springs with a 53 Chevy car frame that I bought. I think they are Speedway springs. Are there any marking on the springs to determine the spring rate?

by Nick

• 2 years ago

1 answer

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I have a 1950 Chevy Coupe with a 2000 LS1 Mustang II 2" drop spindles and AC. What spring rate do you recommend?

by Hot Rod J

• 5 years ago

1 answer

View Answer

Hi, this question is regarding a 1954 Chevy 3100 with a basically stock iron block/heads 350ci mated to a 350 turbo-automatic. No AC, or power steering. I've installed a Heidts weld- in kit and suspension hardware from a donor Pinto to include coils, arms, and manual rack. Otherwise frame is basically stock. Ride with this setup is good, but ride height is pretty low. I'd like to increase ride height about an inch. My question is what spring rate would you recommend? Thanks in advance!

by Paul

• 7 years ago

1 answer

View Answer

What springs do you recommend for Ford F1 1951 original engine?

by Sebastian

• 7 years ago

1 answer

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You say that the springs can be cut for each specific application. Does that mean that the springs would be to long to be used at the manufactured length ?.

by terry

• 7 years ago

1 answer

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I have a 39 Ford Slantback 2door with a 350/350 combo with AC, what is the best rate, thanks guys

by Hessler

• 8 years ago

1 answer

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i have a mustang 67 fastback with a 302 engine on a Mustang ll suspension. What spring do you recommend?

by hector

• 8 years ago

2 answers

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I have a 1953 F100 (all steel), boxed frame with a '58 392 Chrysler Hemi & modified 400 trans. and Mustang II suspension. What spring should I use?

by Jake

• 8 years ago

1 answer

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How do you determine the length of the spring to be cut to.

by lee

• 8 years ago

2 answers

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I have purchased a hot rod, 1939 Chevy 2 door sedan with a Chevy big block 454 engine with a thm 400 transmission. I need to replace the front springs on the mustang ll front end, can you suggest the rate for the springs?

by Lee

• 8 years ago

2 answers

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