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Qa1

QA1 Ford Mustang II Pro Front Coil-Over System (7/16in Bushing) - Single Adj. - 8in x 500lbs/in

SKU: QAPMS303-08500

Coilover Kits

QAP Coil-Overs - Pro Coil

Qa1

QA1 Ford Mustang II Pro Front Coil-Over System (7/16in Bushing) - Single Adj. - 8in x 500lbs/in

SKU: QAPMS303-08500

Coilover Kits

QAP Coil-Overs - Pro Coil

A$1,830.13
LAST ONE! Est Ship 3-5 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.
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Description

For unmatched ride quality for the street and strip, turn to QA1's Mustang II Pro Coil Shock Systems. With double adjustable, single adjustable, drag "R" series adjustable and non-adjustable valving options, along with four spring rate options, you will find the right coil-over conversion system for you. These shocks are designed to give you the lower ride height and "in the weeds" stance you're looking for, and they utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. Used in drag racing, street performance, autocross, road racing and street rod applications. Each pro coil system includes (2) QA1 high performance shocks, (2) chrome plated, specially designed springs and all mounting hardware. Adjustable Mustang II Pro Coil Systems, Made in the U.S.A., Easy, Bolt-In Installation, Coil-Over, Ride Height Adjustable, Lightweight Aluminum, 100% Dyno Tested and Serialized, Rebuildable and Revalveable by the QA1 Factor or QA1 Authorized Service Centers, Sold in Pairs, , Steel Non-Adjustable Mustang II Pro Coil Systems, Easy, Bolt-In Installation, Coil-Over, Ride Height Adjustable, Polished and Chrome Plated Steel Shocks and Springs, 100% Dyno Tested and Serialized, Sold in Pairs. QA1 Item number MS303-08500

Product Overview

For unmatched ride quality for the street and strip, turn to QA1's Mustang II Pro Coil Shock Systems. With double adjustable, single adjustable, drag "R" series adjustable and non-adjustable valving options, along with four spring rate options, you will find the right coil-over conversion system for you. These shocks are designed to give you the lower ride height and "in the weeds" stance you're looking for, and they utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. Used in drag racing, street performance, autocross, road racing and street rod applications. Each pro coil system includes (2) QA1 high performance shocks, (2) chrome plated, specially designed springs and all mounting hardware. Adjustable Mustang II Pro Coil Systems, Made in the U.S.A., Easy, Bolt-In Installation, Coil-Over, Ride Height Adjustable, Lightweight Aluminum, 100% Dyno Tested and Serialized, Rebuildable and Revalveable by the QA1 Factor or QA1 Authorized Service Centers, Sold in Pairs, , Steel Non-Adjustable Mustang II Pro Coil Systems, Easy, Bolt-In Installation, Coil-Over, Ride Height Adjustable, Polished and Chrome Plated Steel Shocks and Springs, 100% Dyno Tested and Serialized, Sold in Pairs.


Features and Benefits

  • Lightweight Billet Aluminum Coil-Over Shocks
  • Made in the USA
  • Easy, bolt-In Installation
  • Ride Height Adjustable
  • 100% Dyno Tested and Serialized
  • Serviceable and Rebuildable by QA1 Authorized Service Centers

Product Details

Active or Passive Suspension:Passive
Adjustable Compression:Yes
Adjustable Rebound:Yes
Adjustable Ride Height:Yes
Assembled:No
Brand:QA1
Description:QA1 Ford Mustang II Pro Front Coil-Over System (7/16in Bushing) - Single Adj. - 8in x 500lbs/in
Grade Type:Performance
Internal Construction Type:Dual Tube
Manufacturer Part Number:MS303-08500
Part Number:qapMS303-08500
Prop 65 - Short Label:WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Prop 65 Yes/No:Yes
Remote Reservoir:No
Spring Color:Silver
Spring Material:High Tensile Chrome Silicon
Title:QA1 Shock Absorber and Coil Spring Assembly MS303-08500
UPC:806990061652

Part Type

Coilover Set

Data: v4.2 - Upd: 2026-10-07 21:20:55

Features

  • 100% Dyno Tested and Serialized
  • Easy, bolt-In Installation
  • Lightweight Billet Aluminum Coil-Over Shocks
  • Made in the USA
  • QA1 Item number MS303-08500
  • Ride Height Adjustable
  • Serviceable and Rebuildable by QA1 Authorized Service Centers

Specifications

Product Attributes - Brand
QA1
Product Attributes - Manufacturer's Part Number
MS303-08500
Product Attributes - Part Type
Coilover Kits
Product Attributes - Product Line
QA1 Mustang II Coilover Conversion Systems
Product Attributes - UPC
806990061652
Product Attributes - Coilover Kit Position
Front
Product Attributes - Adjustable Valving
Yes
Product Attributes - Number of Valving Selections
18
Product Attributes - Shocks Included
Yes
Product Attributes - Coilover Springs Included
Yes
Product Attributes - Spring Rate (lbs./in.)
500 lbs./in.
Product Attributes - Suspension Height Adjustment
0.0-3.0 in. lowered
Product Attributes - Recommended Front-End Weight
1,351-1,525 lbs.
Product Attributes - Gas Charged
No
Product Attributes - Upper Mount
Stud
Product Attributes - Lower Mount
Eyelet
Product Attributes - Shock Body Material
Aluminum
Product Attributes - Shock Body Finish
Silver
Product Attributes - Bushing Material
Rubber
Product Attributes - Bushing Color
Black
Product Attributes - Spring Finish
Chrome
Product Attributes - Crossmember Included
No
Product Attributes - Adjustable Mounting Bracket Included
No
Product Attributes - Hardware Included
Yes
Product Attributes - Welding Required
No
Product Attributes - Quantity
Sold as a pair.
Product Attributes - Notes
Coilover shocks are single adjustable Mustang II Pro MS303 shocks with 7/16 in. lower eyelet bushing. Springs are 8 in. 8MB500 springs. Includes 2 springs and 2 coil-over shocks.

Reference Information

Brand Name/s Qa1
StreetFX SKU qapMS303-08500
SFX Item ID 4094922
Supplier Item Code 4094922
Manufacturer SKU MS303-08500
Manufacturer UPC 806990061652
Alternative References qa1, QA1-MS303-08500, (7/16in, 8in, 500lbs/in

Brochures

Compatibility

Application Data
  • MakeFORD
    ModelMUSTANG II
    Submodel2+2
    Beginning Year1974
    Ending Year1974
    Engine TypeL4
    CID140
    Liter2.3
    Engine Size2.3L/140
    Engine FamilyFord 4-cylinder
    DrivetrainRWD
    Engine VIN CodeY
  • MakeFORD
    ModelMUSTANG II
    Submodel2+2
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    Submodel2+2
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2792
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    Submodel2+2
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2803
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2792
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelBASE
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2803
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelBASE
    Beginning Year1974
    Ending Year1978
    Engine TypeL4
    CID140
    Liter2.3
    Engine Size2.3L/140
    Engine FamilyFord 4-cylinder
    DrivetrainRWD
    Engine VIN CodeY
  • MakeFORD
    ModelMUSTANG II
    SubmodelBASE
    Beginning Year1974
    Ending Year1978
    Engine TypeV6
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelBASE
    Beginning Year1975
    Ending Year1978
    Engine TypeV8
    CID302
    Liter5.0
    Engine Size5.0L/302
    Engine FamilyFord small block Windsor
    DrivetrainRWD
    Engine VIN CodeF
  • MakeFORD
    ModelMUSTANG II
    SubmodelGHIA
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2792
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelGHIA
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2803
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelGHIA
    Beginning Year1974
    Ending Year1978
    Engine TypeL4
    CID140
    Liter2.3
    Engine Size2.3L/140
    Engine FamilyFord 4-cylinder
    DrivetrainRWD
    Engine VIN CodeY
  • MakeFORD
    ModelMUSTANG II
    SubmodelGHIA
    Beginning Year1974
    Ending Year1978
    Engine TypeV6
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelGHIA
    Beginning Year1975
    Ending Year1978
    Engine TypeV8
    CID302
    Liter5.0
    Engine Size5.0L/302
    Engine FamilyFord small block Windsor
    DrivetrainRWD
    Engine VIN CodeF
  • MakeFORD
    ModelMUSTANG II
    SubmodelMACH 1
    Beginning Year1974
    Ending Year1974
    Engine TypeL4
    CID140
    Liter2.3
    Engine Size2.3L/140
    Engine FamilyFord 4-cylinder
    DrivetrainRWD
    Engine VIN CodeY
  • MakeFORD
    ModelMUSTANG II
    SubmodelMACH 1
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2792
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelMACH 1
    Beginning Year1974
    Ending Year1974
    Engine TypeV6
    CC2803
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelMACH 1
    Beginning Year1974
    Ending Year1978
    Engine TypeV6
    CID171
    Liter2.8
    Engine Size2.8L/171
    Engine FamilyFord V6
    DrivetrainRWD
    Engine VIN CodeZ
  • MakeFORD
    ModelMUSTANG II
    SubmodelMACH 1
    Beginning Year1975
    Ending Year1978
    Engine TypeV8
    CID302
    Liter5.0
    Engine Size5.0L/302
    Engine FamilyFord small block Windsor
    DrivetrainRWD
    Engine VIN CodeF

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