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Home Chassis & Suspension Suspension Components UMI Performance Stage 4 Handling Kits GBF005-2-B
UMI Performance Stage 5 Handling Kits ABF409-1-B
UMI Performance Stage 5 Handling Kits ABF409-1-B $2,855.00
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Hotchkis Sport Suspension Stage 2 TVS Systems 89002-2
Hotchkis Sport Suspension Stage 2 TVS Systems 89002-2 $2,855.00

UMI Performance Stage 4 Handling Kits GBF005-2-B

$2,799.00

Suspension Handling Package, Stage 4, Black Powdercoated, Buick, Chevy, Oldsmobile, Pontiac, Kit

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Category: Suspension Components
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Description

Overview

Brand: UMI Performance
Manufacturer’s Part Number: GBF005-2-B
Part Type: Suspension Handling Packages
Product Line: UMI Performance Stage 4 Handling Kits
Summit Racing Part Number: UPI-GBF005-2-B
Front Coil Springs Included: Yes
Rear Coil Springs Included: Yes
Rear Leaf Springs Included: No
Front Shocks/Struts Included: Yes
Front Shock Type: 361-position adjustable monotube
Rear Shocks/Struts Included: Yes
Rear Shock Type: 361-position adjustable monotube
Front Sway Bar Included: Yes
Front Sway Bar Color: Black
Front Sway Bar Type: Solid
Front Sway Bar Diameter (in.): 1.250 in.
Front Sway Bar Diameter (mm): 31.75 mm
Rear Sway Bar Included: Yes
Rear Sway Bar Color: Black
Rear Sway Bar Type: Solid
Rear Sway Bar Diameter (in.): 1.000 in.
Rear Sway Bar Diameter (mm): 25.40 mm
Tie Rod Sleeves Included: No
End Link Bushings Included: Yes
Rear Leaf Spring Bushings Included: No
Sway Bar Bushings Included: Yes
Upper Trailing Arms Included: Yes
Lower Trailing Arms Included: Yes
Trailing Arm Mount Braces Included: Yes
Panhard Bar Included: No
Torque Arm Included: No
Upper Control Arms Included: Yes
Lower Control Arms Included: Yes
Control Arm Style: Tubular
Control Arm Material: Steel
Control Arm Color: Black
Front Strut Tower Bar Included: No
K-Member Included: No
K-Member Support Brace Included: No
Rear Strut Tower Bar Included: No
Subframe Connectors Included: No
Chassis Stiffener Included: No
Calipers Included: No
Rotors Included: No
Brake Pads Included: No
Brake Lines Included: No
Wheel Studs Included: No
Center Link Included: No
Spindles Included: No
Inner Tie Rod Ends Included: No
Outer Tie Rod Ends Included: No
Bushing Material: Delrin®
Bushing Color: Black
Mounting Hardware Included: Yes
Quantity: Sold as a kit.
Notes: 550 lbs./in. front springs.

UMI Performance Stage 4 Handling Kits

UMI Performance Stage 4 handling kits give you everything you need to transform your ride into a high performance handling machine, with the adjustability to perform at the track or cruise around with family and friends. These kits consist of UMI’s proven upper and lower tubular A-arms loaded with 1/2 in. taller upper ball joints, and Viking’s new front hybrid coilovers with double adjustable shocks. They provide you with a precise steering feel and straight-line stability, as well as ride height, compression, and rebound adjustment.

UMI kits also include:

* Front chromoly sway bar
* Rear tubular pro-tour bar
* Rear adjustable tubular frame braces
* Lower trailing arms
* Fully adjustable Roto-Joint upper control arms

Shipping & Delivery
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Effective Date: August 9, 2025

At X Factors Motorsports, we are committed to delivering your order quickly, securely, and affordably.


1. Processing Time

  • Orders are typically processed within 1–2 business days after payment is confirmed.

  • Orders placed on weekends or holidays will be processed on the next business day.


2. Delivery Times

  • Domestic Shipping (United States): Delivery takes 5–7 business days from the date of shipment.

  • International Shipping: Delivery times vary by destination and may take 7–21 business days depending on customs processing and local delivery services.


3. Shipping Rates

  • United States: Free standard shipping on all orders.

  • International: Shipping costs are calculated at checkout based on the delivery address, package weight, and destination country.


4. Carriers Used

We ship orders using trusted carriers such as UPS, FedEx, USPS, and DHL to ensure reliable delivery. Tracking numbers are provided for all shipments.

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    At X Factors Motorsports, we specialize in high-performance engines, outboards, and premium automotive equipment. With expert support, fast shipping, and trusted brands, we help builders, racers, and enthusiasts power their passion — one project at a time.

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