frrp axle back??

Ford Racing Axle-Back Exhaust (3.5 inch Tips) - For 05-07 Mustang GT
Part #: M52305GT

Ford Racing has made the perfect and affordable exhaust system for the 05-07 Mustang GT. The kit is actually made by Borla, under contract for Ford Racing. This kit provides the perfect marraige of sound & performance.

T-304 stainless construction
Proven increase in horsepower and torque
Louder, 'throatier' exhaust note
49 state drive-by noise legal (not legal in CA)
Includes mufflers with Ford Racing embossed 3.5' exhaust tips
Fits 2005-2007 Mustang GT

Price $465.88

Ford Racing Axle-Back Exhaust (4inch Tips) - For 05-07 Mustang GT
Special Sale Pricing!
Part #: M5230GTA


Ford Racing has made the perfect and affordable exhaust system for the 05-07 Mustang GT. This kit is an alternative to the M52305GT kit, which is louder, and is only 49 state legal.

T-304 stainless construction
Proven increase in horsepower and torque
Louder, 'throatier' exhaust note
50 state legal
Includes mufflers with 4.0' polished exhaust tips
Normal Price - $306.47

Fits 2005-2007 Mustang GT

Price $289.95
 
where can i get that deal? its 465??? for the 49 state legal axleback, and cheaper for the 50 state legal axle back??? is the 50 state legal significantly quiter than the other? anyone? what if i do the 50 state legal axleback with a pypes off-road x-pipe?