You would have to buy a whole turbocharger system. I am uncertain if a kit is even made for the Altima 2.5. If the Altima 2.5 is a manual, then the transmission is quite capable of handling up to 300whp. The Altima 2.5 shares transmissions and engines with the Nissan Sentra SE-R Spec-V which has the QR25DE.If you meant the Altima 3.5 with the VQ35DE, then I do believe there are turbocharger kits available.
One can buy Nissan Altima accessories from a local car dealer, an automobile repair shop, or online from retailers. Amazon and eBay are two options for buying accessories for the Nissan Altima.
Dealer.
In a Nissan Altima.
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Nissan Altima was created in 1993.
I supposed to buy a kit for the motor.??
You may find reliable information about Nissan Altima parts at either of the following web sites...www.edmunds.com Used Cars Nissan Altima 2011 Altima or www.insideline.com/nissan/altima/.../2013-nissan-altima-35-sl-full-tes...
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Any auto parts store