JWT RZ1 / RZ2 Performance Camshaft Set for 2007+ Nissan Altima models equipped with the QR25DE engine. This kit includes the RZ1 intake camshafts and RZ2 exhaust camshafts. This Kit must be used with JWT AQR25-SPRRZ Valve Spring Set.

Camshaft Specs:

• Description: QR25DE RZ1/RZ2
• Intake: 300/.452" (11.50MM)
• Exhaust: 289/.434" (10.99MM)
• Cold Lash: .012" 

Additional Information:

• Installation Instructions
• Required Springs: #AQR25-BHIVE
• Cylinder Head Clearancing Instructions 

Fits:

• 2007+ Nissan Altima (L32 + L33)
  • 2.5L QR25DE equipped models

NOTE:

• Professional motorsports application; must check for head & piston clearance, special JWT Valve Springs MUST be installed no less than OEM installed height 34.55MM
• This height to be measured above spring washer (not including) set cold last to .012" must use late DLC Lifters & Break-In Oil. No running below 2000 RPM for 1st 20 mins (8400 rev limit) 
• Due to the much larger lobes on Altimas, cylinder head lobe clearance must be checked clearanced as needed
• Please be sure to select whether you'd like to include the required Spring / Retainer Set with the purchase of this Camshaft Set from the Available Options drop-down. Generic image used; physical parts you receive will likely differ in appearance.