Looks like for $600 you can get the power of an R model in your standard sl.
Power of an “R” model with upgraded tune for SL model $599.00. 2020 Slingshot
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So the non-R versions are just retarded tunes. HAHAHAHAHAH what a rip-off.
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Whats even worse is they they don't offer the manual in the standard sl version
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$600 for basically installing what really should have been the standard tune seems a bit much!
We already know the AutoDrive costs more than the manual trans, soI hope Polaris eventually offers a manual trans with the detuned engine with either the SL trim or, even better, w/o the infotainment system at an even lower price point. That would be an ideal starting setup for those who want to add boost and/or otherwise customize their Slingshot.