QA1 Coilover Adjustable Spring Lowering Kit - HK53-GMF2RN ⚠ Check if this part fits your vehicle Select your vehicle to confirm fitment before you buy. Select vehicle QA1 HK53-GMF2RN Level 3 Handling Kit with Narrowed 9in. Housing Manufacturer: QA1 Manufacturer part number: HK53-GMF2RN Old price: $12,443.46 Price: $10,736.95 Ship to Select country United States of America Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia (Plurinational State of) Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cabo Verde Cambodia Cameroon Canada Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo (Democratic Republic of the) Cook Islands Costa Rica Côte d'Ivoire Croatia Cuba Curaçao Cyprus Czechia Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Eswatini Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See Honduras Hong Kong Hungary Iceland India Indonesia Iran (Islamic Republic of) Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea (Democratic People's Republic of) Korea (Republic of) Kuwait Kyrgyzstan Lao People's Democratic Republic Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Luxembourg Macao Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia (Federated States of) Moldova (Republic of) Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island North Macedonia Northern Mariana Islands Norway Oman Pakistan Palau Palestine, State of Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Puerto Rico Qatar Réunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Sweden Switzerland Syrian Arab Republic Taiwan, Province of China Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom of Great Britain and Northern Ireland United States Minor Outlying Islands Uruguay Uzbekistan Vanuatu Venezuela (Bolivarian Republic of) Vietnam Virgin Islands (British) Virgin Islands (U.S.) Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe * Other * Shipping Method Name Estimated Delivery Price No shipping options Apply Custom wishlist OK Add to wishlist Add to compare list Email a friend PRODUCT OVERVIEW QA1's Handling Kit is the premier suspension upgrade for '75-81 Camaro/Firebird (GM F-body) owners seeking exceptional handling. This kit replaces the front and rear suspension with QA1 MOD series 4-way adjustable coilovers and a narrowed QA1 9" rear housing, and four-link optimized for wider wheels and tires. HUGE HANDLING GAINS Experience superior handling with lightweight control arms that improve geometry and reduce flex. The adjustable four-link design eliminates wheel hop and improves traction and handling. Front and rear sway bars and subframe connectors minimize roll in tight corners. AGGRESSIVE STANCE Factory springs limit stance, but QA1's MOD series coilovers and 4-link offer 2 inches of front adjustability and 1.25 inches in the rear for ideal ride height. The kit allows for massive 12-inch-wide wheels with 335 tires. PERFORMANCE 9" REAR HOUSING Strength: Fabricated center section with 3 OD, wall axle tubes support 800HP and 31 spline axles are rated to 650HP. Features: Standard options include powder coat, drain and fill plugs, jack pad, and all necessary hardware. Specs: Narrowed wheel mounting width: 56-1/8 (narrowed 2-1/2 per side for mini tubs) Big Ford New Style Torino Axle Flanges with 2.5 axle offset Bolt pattern: 5x4-3/4 for easy wheel compatibility Wheel studs: x 3 for alloy wheels Requires third member for Ford 9 housings with 31 spline axles EASY INSTALL The QA1 Handling Kit features a straightforward installation. The rear crossmember needs minimal MIG welding, and all other components are direct bolt-in. MADE IN THE USA Components manufactured in the USA FITMENT NOTES Narrowed housing is recommended for custom offset wheels and mini tubs Verify wheel and tire fitment on the vehicle Mini tubs required for maximum tire width Some welding may be necessary Exhaust modifications may be neededNote: PRODUCT OVERVIEW QA1's Handling Kit is the premier suspension upgrade for '75-81 Camaro/Firebird (GM F-body) owners seeking exceptional handling. This kit replaces the front and rear suspension with QA1 MOD series 4-way adjustable coilovers and a narrowed QA1 9" rear housing, and four-link optimized for wider wheels and tires. HUGE HANDLING GAINS Experience superior handling with lightweight control arms that improve geometry and reduce flex. The adjustable four-link design eliminates wheel hop and improves traction and handling. Front and rear sway bars and subframe connectors minimize roll in tight corners. AGGRESSIVE STANCE Factory springs limit stance, but QA1's MOD series coilovers and 4-link offer 2 inches of front adjustability and 1.25 inches in the rear for ideal ride height. The kit allows for massive 12-inch-wide wheels with 335 tires. PERFORMANCE 9" REAR HOUSING Strength: Fabricated center section with 3 OD, wall axle tubes support 800HP and 31 spline axles are rated to 650HP. Features: Standard options include powder coat, drain and fill plugs, jack pad, and all necessary hardware. Specs: Narrowed wheel mounting width: 56-1/8 (narrowed 2-1/2 per side for mini tubs) Big Ford New Style Torino Axle Flanges with 2.5 axle offset Bolt pattern: 5x4-3/4 for easy wheel compatibility Wheel studs: x 3 for alloy wheels Requires third member for Ford 9 housings with 31 spline axles EASY INSTALL The QA1 Handling Kit features a straightforward installation. The rear crossmember needs minimal MIG welding, and all other components are direct bolt-in. MADE IN THE USA Components manufactured in the USA FITMENT NOTES Narrowed housing is recommended for custom offset wheels and mini tubs Verify wheel and tire fitment on the vehicle Mini tubs required for maximum tire width Some welding may be necessary Exhaust modifications may be needed Products specifications Attribute name Attribute value Prop 65 Yes/No Yes Prop 65 - Short Label WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov Brand QA1 Manufacturer Part Number HK53-GMF2RN UPC 00806990230706 Shock Valving MOD Series Control Arm Color Black Front Spring Rate 450lb/in. Front Shock Type MOD Rear Spring Rate 170lb/in. Grade Type Performance Rear Shock Type MOD Universal Or Specific Fit Specific Front Sway Bar Color Black Rear Sway Bar Color Black Country of Origin US Condition New 🚗 Compatible with 14 vehicles are compatible with this product · 1975–1981 Looking for fitment details? Add your vehicle and we'll show you instantly whether this part fits. + Add Vehicle