gibson exhaust

I noticed that this gibson exhaust is stated to only fit the 2wd models. Would it not fit the standard cab 4 wheel drive models and can someone tell me what the difference may be. ? Would it be possible to mod this exhaust to make it work? Thanks Tim
Gibson#462-618805

Swept-Side Cat-Back Exhaust 2005-09 Toyota Tacoma 2.7L 2WD
Standard Cab, Short Bed
2.5" Pipe, 3.5" Tip

 

I put a gibson cat back on an 09 ford ranger 2wd 4cyl. It made it sound like a rice burner and no noticeable difference in mpg or performance from stock. Put the $$ toward an upgraded sound system to enjoy your favorite tunes. Just my $.02.

 

I had a Gibson on my 99 Tacoma with the v 6 . It didn't do anything for mpg or preferences ether . It sounded good . Check with Gibson to see if it fits your application or you could take it to a muffler shop and have them cut and weld it to fit .