There are 2 good options for actually carrying your kayak on a kayak carrier, and that depends on whether you will be carrying multiple whitewater kayaks or not. If just one or two whitewater kayaks then the Yakima HullRaiser kayak rack is the way to go. you can eaily hoist each kayak onto the Yakima HullRaiser cradles and you have a very efficient and secure setup. You'll need a pair of Yakima HullRaiser kayak carriers for each kayak. If you are carrying 3-4 kayaks then the Yakima Kayak Stacker is the choice. You simply set each boat on its side and strap them to the upright posts and you can carry up to 4 kayaks stacked on their sides very easily. Just make sure to get an extra set of Yakima Straps. The Yakima Kayak Stacker comes with a pair of straps that you can use to strap down 2 kayaks on one side but you would need another pair to strap down the 2 boats that are on the other side of the Kayak Stacker posts.
Regardless of what kayak carrier you choose, you will still need a multi-purpose base rack system to serve as the platform that you will connect the kayak carriers to. The Yakima Q Towers roof rack system is the setup you will need for your 1993 Lexus SC400. Inaddition to the Q Tower system you will also need to use the Yakima Q Stretch Kit in conjunction with the Q Tower roof rack. The Q Strech Kit is necessary for cars with short roof lines such as your Lexus SC 400. It enable the Q Towers to be farther apart, stretching out the distance between the 2 crossbars on the Q Tower system. This is necessary to create an adaquate amount of distance between the 2 crossbars for a stable platform to attach the kayak racks and transport the kayaks.
So, for a 1993 Lexus SC400 roof rack system to carry a kayak or kayak(s) you will need:
1) Yakima Q Towers base rack system (with 2 pairs of Q14 Clips, these are specific to your 1993 Lexus SC400), the 48 inch crossbars length is recommended too.
Yakima Roof Racks - 2008 All-New Yakima Q Tower Complete Car Roof Rack
2) Yakima Q Stretch Kit
2008 Yakima Q Stretch Kit for use with the Q Towers on Short Roofed Cars & Trucks - 8000134
3) Either the Yakima HullRaiser kayak rack or Kayak Stacker
Yakima Kayak Racks - Yakima HullRaiser Kayak Rack for Car Roofs (4039)
Yakima Kayak Stackers - Yakima Kayak Stacker Racks for Car Roofs (4036)
4) A 4 pack of Yakima locks is a good idea for locking the Q Tower system to the rooftop. And a pair of Lashlock kayak lock cables is good for locking the whitewater kayaks to the rack.
Yakima Locks for Car Racks Including Bike Ski Snowboard Kayak Canoe Locks
Lashlock Car Roof Rack Locking Systems - Looking for kayak locks, canoe locks or surfboard locks? - The Lash Lock is your answer
Here's a few pages that have pictures of car rack installations that use the Yakima Q Towers & Q Stretch kit, the Yakima HullRaiser kayak rack:
Yakima Q Stretch Kit Adapter Customer Installation Pictures
Yakima Hullraiser Kayak Rack Customer Installation Pictures
best solution for 1993 lexus sc400 whitewater kayak rack
1993 Lexus SC400 kayak roof rack recommendation
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