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Progress Sport Springs
Part #: 40.0435
$290.16
$284.36
For 4
For 4
Free Shipping! *to continental U.S. only
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Video Description:This episode of Andy's Auto Sport TV explains all the popular ways to lower your truck, including:
*Lowering Spindles
*Coil Springs
*Flip Kits
*Block Kits
*Hangers
*Shackles
*Leaf Springs
*Lowering Control Arms
We also explain how do an economic "leveling" drop, and we explain how you can combine different drop components if you want to slam your truck.
For the last 20 minutes of the video, we show a step-by-step installation of these parts on our project truck, and at the 34:06 mark we show the finished product.
Fits On:
05-09 Chevrolet HHR
Description:
Our engineering staff has decades of experience in the design and tuning of performance suspension systems, including CART/Indy Cars, IMSA, SCCA, NASA, and SCORE competitors. These spring designs reflect our ability to develop a successful blend of appearance, handling capability, and ride quality. These springs feature increased spring rates for upgraded handling capabilities as well as progressively wound springs for superior ride quality.
These springs are designed to work with OEM shocks but will benefit from using high performance shocks such as Tokico or Bilstein.
Progress specifies only certified high-tensile SAE spring wire materials. Our springs are cold-wound on modern CNC coiling machines, then stress relieved, pre-set, and shot-peened for maximum durability.
Features
-Front drop: 1.5" --- Rear drop: 2.3"
-Front rate: 160 lbs/in --- Rear rate: 155 lbs/in
-Limited lifetime warranty!
-All spring kits are powdercoated metallic gray.
Our engineering staff has decades of experience in the design and tuning of performance suspension systems, including CART/Indy Cars, IMSA, SCCA, NASA, and SCORE competitors. These spring designs reflect our ability to develop a successful blend of appearance, handling capability, and ride quality. These springs feature increased spring rates for upgraded handling capabilities as well as progressively wound springs for superior ride quality.
These springs are designed to work with OEM shocks but will benefit from using high performance shocks such as Tokico or Bilstein.
Progress specifies only certified high-tensile SAE spring wire materials. Our springs are cold-wound on modern CNC coiling machines, then stress relieved, pre-set, and shot-peened for maximum durability.
Features
-Front drop: 1.5" --- Rear drop: 2.3"
-Front rate: 160 lbs/in --- Rear rate: 155 lbs/in
-Limited lifetime warranty!
-All spring kits are powdercoated metallic gray.
Progress Technology is a premiere manufacturer of performance suspension components, and its staff has delved in everything from SCCA to Indy Car and SCORE racing. Only the best materials go into each and every Progress Technology product, ensuring improved performance and handling over many lesser brands. The company takes itself very seriously, while recognizing that the end goal is to have as much fun with our vehicles as possible.
Q: Are coil springs adjustable?
A: Coil springs are non-adjustable and have pre-set height and spring rates. Make sure you choose the right drop for your truck the first time, because otherwise you will need to purchase a new set if you have a change of heart.
Q: What are coil springs? Why buy coil springs?
A: Coil springs are one way to lower the front end (and in some cases the rear) of your truck or SUV. Many trucks have factory coil springs as part of the suspension for the front of the truck, and these can be replaced with coil springs engineered to lower your truck. You can lower the front of your truck in multiple ways; using lowering coil springs is just one of them. Coil springs are popular because they are, in general, less expensive than other means of lowering the front of your truck. Most coil springs can be used with either your factory spindles or aftermarket lowering spindles.
Q: Do coil springs come in sets of 4?
A: Coil springs are sold on our site in sets of two unless otherwise noted. Spring companies sell these springs in sets of two for the front (and two for the rear when applicable, depending on your truck or SUV).
Q: How do you install coil springs?
A: We recommend taking your truck to a professional shop for installation because removing the compressed shock can prove dangerous. Coil springs are installed by removing the factory springs and shocks from their perch, installing the new coil springs and re-installing the shocks.
A: Coil springs are non-adjustable and have pre-set height and spring rates. Make sure you choose the right drop for your truck the first time, because otherwise you will need to purchase a new set if you have a change of heart.
Q: What are coil springs? Why buy coil springs?
A: Coil springs are one way to lower the front end (and in some cases the rear) of your truck or SUV. Many trucks have factory coil springs as part of the suspension for the front of the truck, and these can be replaced with coil springs engineered to lower your truck. You can lower the front of your truck in multiple ways; using lowering coil springs is just one of them. Coil springs are popular because they are, in general, less expensive than other means of lowering the front of your truck. Most coil springs can be used with either your factory spindles or aftermarket lowering spindles.
Q: Do coil springs come in sets of 4?
A: Coil springs are sold on our site in sets of two unless otherwise noted. Spring companies sell these springs in sets of two for the front (and two for the rear when applicable, depending on your truck or SUV).
Q: How do you install coil springs?
A: We recommend taking your truck to a professional shop for installation because removing the compressed shock can prove dangerous. Coil springs are installed by removing the factory springs and shocks from their perch, installing the new coil springs and re-installing the shocks.
If you live in California, please note this item may be subject to a Proposition 65 warning. Click here to learn more.
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