Seriously.... who makes an aftermarket air intake for the CRD? What are you guys doing for that? I see some guys doing a V6 airbox upgrade or something, but I'm wondering if one of the major aftermarket players has a solution (AFE, AEM, K&N, etc.)

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05 CRD Sport (SOLD... now 2011 VW JSW TDI)
ECU: GDE HOT
Exhaust: CAT DEL w/ Magnaflow PN12226
Wheels: Goodyear Eagle GT II P275/45/R20, Baccarat

Steer clear of K&N they let dirt pass. Hold one up to the light and you can see the pin holes through the gauze they use. K&N is great for racers who race on dirt tracks and rebuild their engines often. I hear of one guy that drilled holes in the bottom half of his air box to increase flow (don't do the top it will suck in dirt).
Others have added snorkel kits.

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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

Yeah, definitely stay away from K&N. Probably don't need anything with this truck. There is a lot of research is the truck world that intakes are basically a waste of money unless your at really high hp. I am using a AFE filter in my 06 Dodge now with a couple of UOAs that are good. I also used the AMSoil EaA filter in the libby and UOA compared to stock was no different.

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HERS:'16 WK2 Limited EcoDiesel - GDE hot
HIS: '06 Liberty CRD - EHM , GDE eco, Brite Box, Stanadyne FM100, Cummins lift pump, OME lift
'06 Dodge/Cummins - Play truck; a couple of fans, a proper cam shaft, and man handled electrons by EFILive 500/900
'01 Dodge/Cummins - Work truck; Lots of mods

i agree with tinman, i would just do that upgrade to the big one or put an aftermarket filter like AFE or amsoil, probly amsoil to tell you the truth.

i plan on just get'n some aluminum that i have lay'n around and tig up an intake of some sort when i have some extra time.

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06 Cummins 2wd- industrial injection sliver bullet 66,pdi manifold,smarty(tnt tune),Dr. Performance predator w/ race tune,Fass 150/200,Goerend full billet trans,Pusher intake manifold,snow meth,boost fooler,cal tracs, Stage 2 AFE, about 9 isspros, II dual feed lines, wicked injection pump, mag hytec's, studs,spings and cam.

2005 CRD

Someone did some airflow testing awhile back which showed that there was virtually no restriction in our intake system. The V6 intake box uses the same filter as the stock CRD box, so no improvement there. The V6 intake horn is reported to be a little narower and possibly more restrictive than the OE one. The CRD box was reported by one board member here, to let rain into the intake but I have checked mine in the heavyest rain and found no water on or in the filter. You will be very unlikely to see any real improvement at all with any after market intakes with this rig. Throw an Amsoil EA filter on it and call it done.

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Manure green 2005 CRD sport4x4, GDE Hot tune, Cat Gut, OE skids, Draw tight hitch, Duramax lift pump, 160K on multiple varieties of fuel, XM radio, Escort live with Redline, fog light mod, GPS, Icom IC7000 all band radio call sign KC9QPF, Grabber AT2s on Soft 8s, FIA grill blanket.

These engines get more than enough air. Put in an Amsoil EAA filter and youre good.

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2006 KJ CRD Ltd - Suncoast, GDE Eco, EGR Delete, After market T-Stat, Skid Row skids, V6 airbox, 2.5" Turbo back
2005 KJ CRD Sport-Suncoast, Transco, GDE Hot-GDE Trans, EGR Delete, Skid Row skids, V6 airbox, 2.5" Turbo back, After market S-Stat
1987 Suzuki LWB Samurai -diesel powered, custom 4 link coil suspension 38.5 SX Swampers