Andy, sorry for the late reply, here is the info I got from Dave, I assume it's Dave you were asking about , whether they made high flow systems?

I currently don't offer a true bolt on exhaust system, however I do offer
(2) 2-1/2" cat back exhaust kits.* The kit below for $255 offers the tunnel
hanger pre welded, and the 3 bolt flange tig welded.* The hangers for the
rear muffler and gas tank area still require welding.* There are other
companies that offer a pre welded hanger/flange kit but the customer should
verify that these systems offer a welded 3 bolt flange or if the 3 bolt
flange is floating, has the B pipe reduced in size for the floating flange.

2-1/2" stainless tubing kit (loose) $205
3" stainless tubing kit (loose) $230
2-1/2" stainless tubing kit (w/ 2 hangers and 1 tig welded flange) $255
(stock layout)
2-1/2" stainless tubing kit (1 tig welded flange) $245 (for use with SMSP
headers)

Then pick 1 of the following resonators
14" aluminized resonator $50
18" aluminized resonator $55
22" aluminized resonator $60
14" stainless resonator $60,* Magnaflow p/n 14416

Then pick one of the following mufflers
6" Round Ti $195, please see
http://www.imagestation.com/picture/...162c13058ecf63
91/f7c72834.jpg
4x9 oval, 5x8 oval, or 6" round* aluminized muffler $70
6" Round Stainless $80, Magnaflow p/n 14616
7" Round Stainless $85, Magnaflow p/n 14716
5x8 stainless muffler $90, Magnaflow p/n 14216
5x8 stainless muffler with 4" dia x 7" tip $125, Magnaflow p/n 14851

Muffler hangers mild steel $2.50 each
Muffler hangers stainless steel $5 each
3-1/2" Polished Stainless Tip $25