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Hi, does anyone know how much power the CVT in the 2010 2.5 SL can handle before needing to be modified or replaced?
 

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To be safe, about 250 hp. I've seen a guy turbo one to 280 with the CVT, but the boost has to be kept very smooth and the CVT fluid changed very frequently. More than that and you'll need a 6-speed conversion. Probably better off finding a good VQ35 with drivetrain and drop it in lock, stock and barrel.
 

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I was tempted to write "50 HP less than the motor puts out."
The 4-cyl CVT's certainly won't take abuse like the 6-cyl versions. I'm pretty sure it's a matter of additional shear from smaller surface area, the 4-cyl versions seem to beat the fluid up much faster. I've seen them go a long way with religious fluid changes, but anybody who believes the advertising about "lifetime fluid" is doomed to a dead tranny around 100K, maybe less. In contrast, the 6-cyls all seem to make 140~150K with the same neglect.
 
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