Wow, great start Mar, fantastic work! I hope you don't mind if I tweak/proof read a bunch of stuff...
2 color (black and red) would probably be expensive no? And let's inverse the black/white.
I'm afraid the front text is a bit generic and might be seen as an advertisement or scam or something... How about:
NISSAN and INFINITY owners
[stop]
Your transmission has a defect and will FAIL
Please turn this over and read now!
For the back...
"If you own an:
('04 or newer)"
Add the QX56 to the model list.
I don't want to specifically tell people to do the Radiator Bypass. Really, people *shouldn't* do it before 80K miles. Lack of proper warm-up could cause people issues in colder climates. So let's change that text on the right to:
"There is a Nissan design flaw in your Radiator/Transmission Cooler, and when it inevitably fails your transmission will be destroyed. Act NOW to save yourself thousands of dollars in repairs!!!"
Capitalize the F in "for more..." and toss "please visit", delete TheNissanPath.com and make NissanTransmissionFail.com nice and big to fill up the space.
Finally good subscript, probably good to capitalize the T and put a period at the end. Also won't most card printers require 1/8th of an inch gutter on the edges? Everything might need to be squeezed in a bit to make room.
-c