Billet CNC Aluminum 550 Spyder Seat Slider Adjuster Knobs

"Builder of turn-key Vintage 550 Spyders, SM550 Spyder Outlaws, & 356 Coupes"

Moderators: Larry Jowdy, SeductionMotorsports

Billet CNC Aluminum 550 Spyder Seat Slider Adjuster Knobs

Postby SeductionMotorsports » Tue Feb 25, 2014 2:59 pm

Just pulled these out of the machine. Machined down from a solid piece of aluminum on our Okuma Genos L250-E CNC Lathe. These seat slider adjuster knobs simply replace the cheap plastic ones that come on all the EMPI seat sliders and other generic sliders.

The slip hole inner diameter is: 8.52mm so check your adjuster rod if you are unsure if these will fit or not. Most all VW/356 Speedsters/550 Spyders use EMPI seat sliders, so they will fit those guaranteed.

We suggest putting a dab of epoxy inside the hole when slipping them on to secure them firmly. You can also use super glue, silicone, two part epoxy, etc.


$12.00 USD for single knob, $20.00 USD for pair (set of 2) of knobs.


$5.25 USD USPS Priority Mail (2-3 business day shipping with shipping insurance included) for within the United States.

$11.00 USD for shipping outside of the United States.

We can combine shipping if you order other small items such as or billet dash lights/wiper knobs, or seat belt bezels, or gas trim plates, etc... as long as it fits into the SMALL FLAT RATE Priority Mail box, the price is $5.25/$11.00 USD.


We accept PayPal. Please send us a message or email us at: with your PayPal email and shipping address. We will then send you an invoice to your provided PayPal email. We will then ship out same day shipping or next day shipping (except Sunday) as soon as payment is received.

Installation Instructions:

1.Pull off old plastic knob. (May need to heat with hair dryer or low heat heat gun to loosen the glue holding on the original knob). Doesn't take much heat.

2. Put dab of epoxy inside new Seduction Motorsports billet aluminum knob and slide on.

3. Finished, grab a cold beer, sit back and enjoy. (Skip beer part if you plan on cruising around town)

Thank you,







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Builder of 550 Spyders, SM550 Spyder Outlaws & 356 Coupes
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