T350 with 3.71 diff, what CR box to go for??

[CHAPS100]

Hi Guys,

Been reading alot about people fitting Close Ratio boxs and the boxs making a huge impact on how the car accelerates. My T350 is fitted with Powers 4.0ltr and the Quaife LSD 3.71. Goes well but you always want more!.

Is it worth fitting a CR box? and what one to go for? I still want the car to do atleast 150+

Thanks for your help guys!

[RichardD]

I only know of the CTS/Quaife CR option (but there may be more).

The link has the ratios so you can work out the % reduction in top speed potentially.

http://www.gearboxman.co.uk/infot5.html