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Superlift 73-91 Chevy K10/GMC K15 4WD 6in Lift Kit Rear Block Kit w/ Superlift Shocks (Bundled Kit)

SKU: SLFK420

Suspension Leveling & Lift Kits

slf3059,slf01-235-6,slf3001-1,slf3000,slf87140,slf87150...

Superlift 73-91 Chevy K10/GMC K15 4WD 6in Lift Kit Rear Block Kit w/ Superlift Shocks (Bundled Kit)

SKU: SLFK420

Suspension Leveling & Lift Kits

slf3059,slf01-235-6,slf3001-1,slf3000,slf87140,slf87150...

A$3,572.63
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Suspension Lift Kit

Established in 1975, Superlift remains a pioneer in the industry, and is one of the few suspension companies operated by true truck and off-road enthusiasts. We are passionate about trucks, wheeling and an outdoor lifestyle that go hand-in-hand. We can talk the talk because we walk the walk.This question.... ''What's best for the customer?''... is always at the top of our list in everything we do, from product planning and design to customer service. This simple guiding principal has served us well for decades, and will continue to guide us into the future.We are proud to provide the truck, Jeep and SUV owner products that perform better than advertised. We understand that most people spend the majority of their windshield time on-road, and our designs reflect this. You will be 100% satisfied with our products on-road or off - we guarantee it! Determining what product is right for your vehicle and lifestyle can be a complicated task, especially with so many companies and options to choose from. We urge you to carefully research your purchase. Most lift kits represent a considerable investment, and you will literally live with your choice for years. Talk to fellow off-roaders, and your local automotive specialty shop before making a purchase. We love to talk shop, and we encourage you to give our tech staff a call. Bottom line... if you do your homework, you'll discover that we've done ours.

Additional Information

6 inch Lift Kit-1973-1987 K10/K15-1973-1991 Blazer/Jimmy/Suburban 1/2 Ton Solid Axle 4WD-Rear Block Kit with Superlift Shocks

Application Summary

1973-1974 Chevrolet Blazer; 1987-1991 Chevrolet Blazer; 1975-1986 Chevrolet K10; 1973-1974 Chevrolet K10 Pickup; 1973-1986 Chevrolet K10 Suburban; 1975-1986 Chevrolet K5 Blazer; 1987 Chevrolet V10; 1987-1988 Chevrolet V10 Suburban; 1989-1991 Chevrolet V1500 Suburban; 1973-1991 GMC Jimmy; 1975-1978 GMC K15; 1975-1978 GMC K15 Suburban; 1973-1974 GMC K15/K1500 Pickup; 1973-1974 GMC K15/K1500 Suburban; 1979-1986 GMC K1500; 1979-1986 GMC K1500 Suburban; 1987 GMC V1500; 1987-1991 GMC V1500 Suburban

Additional Application Notes
• With Solid Axle Wheel Drive: 4WD 6 in. Suspension Lift Kit
• 6 in. Lift; w/Superide Shocks; Rear Block Kit
• With Solid Axle Wheel Drive: 4WD 6 in. Suspension Lift Kit 6 in. Lift; w/Superide Shocks; Rear Block Kit

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

This is a group bundle consisting of:

ImageQtySKUMFR SKUUPCDescription
1xslf3001-13001-1804260007812Superlift Component Box - 2.5-6in Lift Kit - 69-97 GM Pickup - Blazer - Suburban
2xslf8715087150804260104825Superlift 30.07 Extended 17.70 Collapsed (w/ Upper/Lower Eye Mount) Superlift Shock - Single
2xslf8714087140804260104771Superlift 26.07 Extended 15.57 Collapsed - Superlift Shock - (w/ Upper/Lower Eye Mount) - Single
1xslf30593059804260007997Superlift 73-87 Chevy K5 K10/GMC K15 5in Block Kit
1xslf30003000804260007805Superlift 73-87 Chevy/GMC 1/2 & 3/4 Ton 4in Raised Steering Arm
2xslf01-235-601-235-6804260000929Superlift 73-87 GM Standard Pick Up w/ 6in Lift Kit Leaf Spring - Front

Bundled group items may ship from multiple locations and could have slightly longer transit times if parts are sourced from different warehouses.

Images in this listing may include individual and/or group shots of the products included in the bundle. Please refer to the table to see a breakdown of what is included. Click on a SKU to see individual item details.

For details on the individual components in this bundle, click here.

Data: v4.2 - Upd: 2026-11-08 12:40:38

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Avg Install time:8-9 Hours
Description:6in. Lift Kit-73-87 K10/K15/73-91 Blazer/Jimmy/Sub 4WD-Rr Blck Kit wSL Shks
Feature:Front leaf springs, shocks, raised steering arm, rear block and u-bolt kit, and all hardware required
Google Product Type:Chevrolet & GMC Lift Kits
Lift Height:6 in
Lift/Drop Height:6 in.
Shocks:Shadow Shocks
Style:6 in. Suspension Lift Kit
Title:SUPERLIFT LIFT KIT GM 1/2-TON 73-87 6''

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 11:46:10

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Superlift, Superlift Suspension
StreetFX SKU slfK420
SFX Item ID 4528723
Accounting SKU slf-K420
Manufacturer SKU K420
Manufacturer UPC N/A
Alternative References SLF-K420

Suspension Lift, 4WD, 6.0 in. Front/5.0 in. Rear, Chevy, GMC, Kit

Over the years, Superlift has established a reputation as the "go-to" source for suspension components. Superlift suspension lift kits are designed and built by real off-road enthusiasts, so you know they're complete and super-strong. Properly addressing things that are generally ignored by others, yet matter—it all adds up. Superlift suspension lift kits are available in a variety of lift heights and styles to fit your budget and needs.

Depending on the application, Superlift suspension lift kits may feature:
• Steering knuckles, crossmembers, torsion bar brackets, bump stops, belly pan, brake line brackets, and front sway bar links
• Upper and lower control arm drop brackets, center link, rear shocks, rear blocks, and U-bolt kit
• All hardware specific to the application
• Custom-designed, engine-specific spring rates and shock valving
• Ideal caster settings
• Suspension compression travel control
• Correct track bar/pitman arm phasing
• Designed using original equipment CAD data for accuracy
• Compatible with OE stability control and anti-skid control
• No problem codes or irritating dash lights
• Makes room for up to 37 in. tires (varies by make and model)
• Maximum ground clearance
• Maintains awesome ride quality and handling characteristics
• Aligns to OEM specifications
• Corrects front-to-rear factory rake for a level stance
• Detailed instruction manual suitable for do-it-yourself or professional installation

Product Attributes
BrandSuperlift Suspension
Manufacturer's Part NumberK420
Part TypeSuspension Leveling & Lift Kits
Product LineSuperlift Suspension Lift Kits
UPC804260030360
Lift StyleSuspension Lift Kit
Primary Front Lift ComponentLeaf spring
Primary Rear Lift ComponentSpacer
Front Shocks/Struts IncludedYes
Front Shock Quantity Per Wheel1
Front Shock TypeHydraulic twin-tube
Rear Shocks/Struts IncludedYes
Rear Shock Quantity Per Wheel1
Rear Shock TypeHydraulic twin-tube
Brake Lines IncludedNo
Hardware IncludedYes
FMVSS 126 CertificationNo
QuantitySold as a kit.

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