Unfortunately, Whipple does not offer a 2.9L blower for the Lightning, they do offer the 3.4L though, let me know if you would like pricing on that unit. As far as a fuel systems, we have dual and triple return systems available as seen HERE, but if you just want pumps and rails, they are $104.95 per pump + $24.95 per set-up kit and the rails range between $230-$300 depending on brand. We use the Aeromotive rails in our fuel systems and they are $230.60. Hope that answers your questions, let us know if you need help with anything else.
Thanks.
Whipple doesn't offer a 2.9L for the Cobra either, only a 2.3L and a 3.4L available for that car. The 3.4L is available with the standard inlet or the Crusher inlet for max power.