986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

heyjae · 03-21-2009, 09:24 AM

One of the biggest PITA projects for me was installing the seats, so I understand. The main issue is the bolt pattern of the sliders to the seat/side mount and on the other side to the car itself. Basically, there are 3 ways to do it from my research.

Easy, sit low but expensive:
Get the Porsche GT3 seats. Bolts directly to your existing Porsche sliders (you save some money there). If you want it super low, you can get BK adapters to bolt them to the floor directly, but you lose fwd/aft adjustment.

Cheap and easy, but seat height is not (much) lower than stock:
Buy your aftermarket seat of choice, get BK side mounts that bolt directly to your Porsche sliders. You can drill a lower hole to reduce height about 1/2", but it's not ideal. The good thing about these BK mounts is that they have an inboard seat belt mounting point on the bracket. Some race orgs don't allow this, since the lap belt should be mounted to the chassis separately in case the seat comes loose. (FWIW, the stock inboard mounting point is on the seat.) I'm using the BK mounts with extra hole, but I'm only 5' 8" and have a cage so I pass the broomstick test easily. My inboard belt is bolted to the tunnel though and backed w/ the proper plate.

More difficult and more expensive (but not as expensive as GT3 seats), but you'll sit lower:
Buy your aftermarket seat of choice, get universal/Sparco side mounts, use Sparco sliders (they are lower profile than Porsche sliders), and use BK Sparco slider to Porsche floor pan adapter. This costs more since you need to buy side mounts, sliders, and the BK slider adapter. There are other adapters as well (like the one in your post. You can try speedwaremotorsports.com. Just be sure to get the flat and not tabbed adapters.). You might need the BK Sparco slider actuating tube since the rails are 16" wide on Porsches and the Sparco sliders are set for 15" or something like that. This is on my to do list as I want to sit lower.

Avoid the height adjustable Recaro sliders. They are really tall.

I hope this helps.

03-21-2009, 09:24 AM	#11
heyjae Registered User Join Date: Oct 2007 Location: LA, CA Posts: 95	One of the biggest PITA projects for me was installing the seats, so I understand. The main issue is the bolt pattern of the sliders to the seat/side mount and on the other side to the car itself. Basically, there are 3 ways to do it from my research. Easy, sit low but expensive: Get the Porsche GT3 seats. Bolts directly to your existing Porsche sliders (you save some money there). If you want it super low, you can get BK adapters to bolt them to the floor directly, but you lose fwd/aft adjustment. Cheap and easy, but seat height is not (much) lower than stock: Buy your aftermarket seat of choice, get BK side mounts that bolt directly to your Porsche sliders. You can drill a lower hole to reduce height about 1/2", but it's not ideal. The good thing about these BK mounts is that they have an inboard seat belt mounting point on the bracket. Some race orgs don't allow this, since the lap belt should be mounted to the chassis separately in case the seat comes loose. (FWIW, the stock inboard mounting point is on the seat.) I'm using the BK mounts with extra hole, but I'm only 5' 8" and have a cage so I pass the broomstick test easily. My inboard belt is bolted to the tunnel though and backed w/ the proper plate. More difficult and more expensive (but not as expensive as GT3 seats), but you'll sit lower: Buy your aftermarket seat of choice, get universal/Sparco side mounts, use Sparco sliders (they are lower profile than Porsche sliders), and use BK Sparco slider to Porsche floor pan adapter. This costs more since you need to buy side mounts, sliders, and the BK slider adapter. There are other adapters as well (like the one in your post. You can try speedwaremotorsports.com. Just be sure to get the flat and not tabbed adapters.). You might need the BK Sparco slider actuating tube since the rails are 16" wide on Porsches and the Sparco sliders are set for 15" or something like that. This is on my to do list as I want to sit lower. Avoid the height adjustable Recaro sliders. They are really tall. I hope this helps. __________________ 2000 Boxster S http://www.slipangle.com/images/ACSpeed_sig.jpg Last edited by heyjae; 03-21-2009 at 09:47 AM.