With 5 1/2 winters of corrosive salt I decided to buy the the complete cat back system to upgrade the exhaust this spring. The Magnaflow muffler inlet flange is necked down to a 2 1/8 I.D. I was hoping to only have to open up the cat side of the flange the way Warp did his. Magnaflow does sell a stainless 2 1/2" ball flange kit but at a cost of $99.00. I may go that route as I would like to keep it factory looking.

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TWO Identical 2005 Liberty Sport CRDS
#1 CRD, 174,000 miles. Eco tune, Samco hoses. Mobil1 0-40w used since day one
#2 CRD 143,000 miles. Bought used (unknown history) with 100,000 miles. Samco hoses.
Eco tune, new rockers, and 5 volt glow plugs installed at 124,000 miles

I'm thinking of doing the same and have found this flow master at Jeg's, local to me, for $72.99 but they don't list the material and I suspect it's not SS.
http://www.jegs.com/i/Flowmaster/389/15 ... tId=752165
I think I'll just need to get on over to Jeg's

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

Open it up, no one is going to crawl under your CRD and look.
After a few months, no one can tell I modified my flange.
Let Sir Isac Newton rest in peace.
After all, it is fun to blow away the Crossover gassers when you pull away from the stop light.

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2006 Pearl Green CRD
Magnaflow 2 1/2" Cat Back
KJ Extra Leg Room Brackets, Carter Lift Pump, V6 Airbox, ORM
Fuel cooler, Oil Separator, Progard 7
Gauges EGT Boost Trans Temp Oil Pres, Michelin LXT AT2 245 70 R16
7,000# Draw Tight hitch, PML EX Deep Trans Pan
Centrifuge, SunCoast, Transgo, RAM TCM, InMotion Stage 2
Wife's 99 TDI VW Beetle

i took my cat completely out and straight piped the exhaust, sounds mean

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05 CRD Limited, SEGR Kit, EHM, Selectrack Alpine DVD, 6000k HID headlights, Aux Lift Pump, 2.5" straight pipe, Diablo Extreme Puck, Euro converter
02 SLT Cummins H.O. 6spd manual with southbend 3850dd, fass 150hd, ddp 150hp injectors, arp studs, adrenaline stacked w smarty, traction bars, 6 inch stacks, level kit, bhaf