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Heavy Duty Helper Springs
Heavy Duty Helper Springs
Heavy Duty Helper Kits
are designed to add up to 4200 lbs.* of additional load handling capability without affecting ride quality when
unloaded. High strength, cast iron, adjustable brackets allow for custom tuning the helper system to your load handling requirements. All
Heavy Duty Helper Kits have been designed to be a bolt-on product with no welding or drilling required. Manufactured by Dayton Parts in the
USA of the highest quality American steel for superior durability.
• Bolt on installation, no welding or drilling required.
• Does not affect ride quality when vehicle is unloaded.
• High strength cast iron brackets used throughout.
• Adjustable brackets allow for "custom tuning" the helper system.
• Long life insulator pads virtually eliminate noise.
• Manufactured by Dayton Parts from American made materials and
components.
• Applications for most domestic trucks, vans and
• Does not depend on the original suspension to control additional
utility vehicles.
vehicle loading.
Heavy Duty Helper Spring
How to Order:
Order 1 Master Kit which includes all
necessary springs, brackets and U-bolts for the
application listed.
Note: Components have been listed separate from
those master kits that cannot ship UPS.
* Never exceed the manufacturer’s suggested GVW.
Chevrolet / GMC
¹⁄₂
Ton Front
4-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
Blazer, Jimmy, Suburban
1973-91 1000 6 2
³⁄₄
510-402
— — — Tapered extra leaf kit
Blazer, Jimmy, Suburban,
K10/1500 pickup
1967-72 800 6 2
¹⁄₂
510-384
— — — Tapered extra leaf kit, use w/taper leaf
front springs w/ std. eyes only.
K10/1500, V10/1500
1973-87 1000 6 2
³⁄₄
510-402
— — — Tapered extra leaf kit
¹⁄₂
Ton Rear
2-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
C1500 except short bed
w/extended cab
1988-98 2600 1 2
¹⁄₂
510-127
504-127 503-3119 502-215 H14
C1500 short bed w/extended cab 1988-98 2600 1 2
¹⁄₂
510-133
504-133 503-3119 502-215 H14
C10/1500, R10/1500
1985-87 2600 1 2
¹⁄₂
510-205
504-205 503-2101 502-254 H12
Silverado/Sierra 1500
1999-07
— — —
N/A
— — — No heavy duty kit available. See the
Standard Duty section in this
publication.
Silverado/Sierra 1500HD
2002-10
— — —
N/A
— — — No heavy duty kit available. See the
Standard Duty section in this
publication.
¹⁄₂
Ton Rear
2-Wheel Drive Van
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
Astro, Safari w/composite rear
springs
1985-95 3400 — 3
—
AST-1
— AST-2 Steel replacements for OEM composite
springs, Order 2 ea. AST-1 springs and 1
ea. AST-2 u-bolt kit.
See Page 2 for "Remarks Key Chart".
N/A - Not Available
* For model years earlier then those listed refer to the "Standard Duty" section of this catalog.
If the Heavy Duty Kit is not available for your application, refer to the "Standard Duty" or "Air Lift" sections of this catalog.
Chevrolet / GMC