HKS 07-12 LEXUS GS350/GS430/GS460 HIPERMAX S GSE21/GRS204 Full Kit (RWD Only) (80300-AT003)

Regular price $1,701.00 USD Sale price $1,701.00 USD Regular price $1,890.00 USD
Sale 10.0% $189.00 USD (10.0%)
In Stock: 2
SKU: hks80300-AT003
Product Description

The HKS Hipermax S is a dual preload valve system that prevents excessive damping force from being generated at higher piston speeds. This improves ride comfort significantly without compromising driving performance. Hipermax S also includes a new needle jet form that increases the range of damping force adjustment. As a result, we are able to drive on a larger range of stages. Hipermax S has a revolutionary design of bump stop rubber that decreases body roll while also providing ride comfort, which is impossible to do with standard hydro bump stop rubber. Low friction technology outperformed conventional products in terms of durability and friction. This technology aids in the improvement of ride quality and handling.


  • LEXUS GS350/GS430/GS460 (2007, 2008, 2009, 2010, 2011, 2012)


  • Single Tube
  • 30 levels Adjustable Damping
  • Shock body length
  • Adjustable
  • Special Oil
  • PNE Coating
  • Dual Pre-load Valve System
  • Aluminum Bracket
  • Rubber Upper Mount
  • Overhaul Available

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

Customer Reviews

Based on 1 review
Will (San Ramon, CA, US)
HKS Hypermax S for 2008 Lexus GS460

Kamispeed delivered my order within a day which was faster than I anticipated (FL to CA). Thank you to the team at Kamispeed.