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30-Day Startup Warranty
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Auto Parts & Accessories
UMI Performance Stage 3.5 Handling Kits GBF035-2-B
$2,126.51
+ $295.00 flat-rate insured LTL freight
(details)
$2,421.51 delivered to the continental US
- Palletized and heavy shrink-wrapped for freight
- LTL carrier delivery with optional liftgate service
- Ships in 1–2 business days from Los Angeles, CA
- Transit typically 3–7 business days, continental US
Secure checkout by Stripe
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
UMI Performance Stage 3.5 Handling Kit, Ultimate Pro-Touring Upgrade!
The UMI Performance Stage 3.5 Handling Kit is designed for enthusiasts who want a pro-touring-inspired suspension system that delivers track-level performance without sacrificing street comfort. The package eliminates body roll, improves steering response, and enhances overall vehicle stability for spirited backroad driving, auto-crossing, or track days.
Perfect for aggressive street builds, weekend warriors, and autocross competitors!
What’s Included in the Kit?
Tubular Lower Front A-ArmsEquipped with Delrin® bushings for reduced deflection and enhanced control
Tubular Upper Front A-ArmsFeatures Delrin® bushings and ½” taller ball joints for optimized geometry
Heavy-Duty 1.25” Front Sway BarHelps eliminate body roll and sharpen steering response
Adjustable 1” Pro-Touring Rear Sway BarAllows fine-tuning of handling characteristics
1” Lowering Springs (Linear Spring Rate)Improves stance and lowers center of gravity for better grip
Tubular Rear Lower Control ArmsFeatures roto-joints for maximum articulation and durability
Adjustable Rear Upper Control ArmsEnhances traction and pinion angle tuning
Tubular Frame BracesStrengthens chassis rigidity for improved cornering and straight-line stability
Replacement Rear-End Housing BushingsEliminates excess movement for a tighter feel
Front Upper & Lower Grade 8 Hardware KitEnsures a secure and high-strength installation
Rear Control Arm Grade 8 Hardware KitProvides durability under aggressive driving conditions
4 RideTech HQ ShocksDelivers rebound adjustment for fine-tuned ride quality
A complete package engineered for aggressive handling and control!
Technical Specifications
| Feature | Details |
|---|---|
| MFG. Part # | GBF035-2-B |
| Brand | UMI Performance |
| Suspension Type | Handling Package |
| Front Coil Springs Included | Yes (1” Lowering) |
| Rear Coil Springs Included | Yes (1” Lowering) |
| Front Shocks Included | Yes (RideTech HQ Adjustable) |
| Rear Shocks Included | Yes (RideTech HQ Adjustable) |
| Front Sway Bar Included | Yes (1.25” Solid) |
| Rear Sway Bar Included | Yes (1.00” Solid, Adjustable) |
| Upper Control Arms Included | Yes (Tubular Steel) |
| Lower Control Arms Included | Yes (Tubular Steel) |
| Control Arm Color | Black Powdercoated |
| Chassis Stiffener Included | Yes (Frame Braces) |
| Bushing Material | Delrin® |
| Bushing Color | Black |
| Mounting Hardware Included | Yes (Grade 8) |
| Brake Components Included | No |
| Quantity | Sold as a Kit |
Designed to deliver precision handling, chassis rigidity, and race-proven performance!
Fitment & Compatibility
Ideal for GM A-Body Muscle Cars Looking for a Performance Suspension Upgrade
Direct Bolt-On Fitment, No Major Modifications Required
Perfect for Street, AutoX, & Track Applications
Works with Factory & Aftermarket Wheels
Brings modern handling technology to classic muscle cars!
Installation Notes & Tips
No Major Modifications Required, Direct Bolt-On Fitment
Professional Installation Recommended for Best Performance & Alignment
Ensure Proper Wheel Alignment After Installation
Check for Wheel Clearance When Using Lowering Springs & Sway Bars
Upgrade your suspension and experience precise handling like never before!
Frequently Asked Questions (FAQ)
How does the UMI Performance Stage 3.5 Kit improve my vehicle’s handling?
- The combination of RideTech adjustable shocks, tubular control arms, and sway bars enhances steering precision, eliminates body roll, and improves high-speed stability.
Will this kit work with my factory steering components?
- Yes! This kit is fully compatible with OEM or aftermarket steering setups.
Does this kit lower my car?
- Yes! It features 1” lowering springs, improving stance and lowering the center of gravity for better cornering.
Is professional installation required?
- While this kit is bolt-on, professional installation is recommended for proper alignment and suspension tuning.
Can I use this kit for track racing?
- Absolutely! It’s designed for street, autocross, and pro-touring applications.
Call to Action, Upgrade Your Suspension Today!
UMI Performance Stage 3.5 Handling Kit, The Ultimate A-Body Handling Upgrade!
Tubular Control Arms & Frame Braces for Rigidity
RideTech Adjustable Shocks for Performance Tuning
1” Lowering Springs for a Sporty Stance & Improved Handling
Adjustable Rear Sway Bar for Optimized Traction
Direct Bolt-On Installation, No Guesswork, Just Performance!
Order Now & Transform Your Classic Muscle Car into a Modern Handling Machine!
Overview
Brand:
UMI Performance
Manufacturer’s Part Number:
GBF035-2-B
Part Type:
Suspension Handling Packages
Product Line:
UMI Performance Stage 3.5 Handling Kits
Summit Racing Part Number:
UPI-GBF035-2-B
Front Coil Springs Included:
Yes
Rear Coil Springs Included:
Yes
Rear Leaf Springs Included:
No
Front Shocks/Struts Included:
Yes
Front Shock Type:
Non-adjustable
Rear Shocks/Struts Included:
Yes
Rear Shock Type:
Non-adjustable
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:
No
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:
Yes
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:
Rear sway bar is adjustable.
Startup & Installation Checklist
- Replace timing components, water pump and plugs before initial startup where applicable.
- Refill all fluids with manufacturer-specified oil and coolant.
- Verify sensors, ECU pinouts and grounds against your chassis or hull wiring.
- Startup warranty covers heads, block and internal lubricated components for 30 days from delivery.
Full terms: 30-day startup warranty · returns
