Exhaust Manifolds? Stock or Aftermarket?

shakin_bakin · 11-04-2009, 03:43 PM

The 04.5 cummins i bought has a slight crack in the exhaust manifold. Is this that bad? will it effect it much at all?

When I go to replace, should i replace with stock or replace with aftermarket. I have looked at a few different ones, which ones do you suggest if i go aftermarket? Why?

Mods on the truck are "2" leveling kit, 5 inch stacks, zoom VRT clutch, Bullydog tripledog with crazy Larry, edge juice w/attitude (used for guages only) pusher intake, Fass 95 GPH,

my goals... maybe add some power, keep the MPG's up mainly not towing heavy loads or anything just like the cummins thats all.

Shibbyutman · 11-04-2009, 03:51 PM

depends how deep your pockets are, stock manifolds can be had for 40 plus shipping on the forum here, I think even a used aftermarket you'll be looking at 300-350 still

__________________
2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped

, FASS 150/150, and big line kit.

shakin_bakin · 11-04-2009, 04:09 PM

well whats the gain? Does it make it more efficient? help MPG good gain on Torque and HP??

Shibbyutman · 11-04-2009, 04:35 PM

it will spool any turbo faster regardless of which one you go with and they will flow more, so that means your top end HP will be increased as well. You won't be using it's full potential however without porting the head and manifold to match which is a step few bother to take.

__________________
2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped

, FASS 150/150, and big line kit.

Quaticman · 11-04-2009, 05:53 PM

I installed a BD pulse flow exhaust manifold last Saturday.
The turbo spools a little faster and EGT's are down marginally also. I would say it's a worthwhile upgrade.
If you want a replacement '03 exhaust manifold cheap PM me, I have the stocker sitting in the shop.

__________________
03 2500 4x4 RC 5.9 SO; 47 RE billet; ATS flex plate; SMARTY Revo-TNT/Dr. P; BD Super B turbo/exhaust manifold/IC boots; Devils Own; Air Dog; K&N CAI; S&B; MBRP 4"; Mag Hytec; Auto Meter C2 gauges; Quad BF/RP gauge; Fluidamper; rail capped; 455 HP/852 TQ.

TOW THE MARK · 11-04-2009, 08:47 PM

i'd go with ats or pdi i have 2 ats on both 04.5 and 06. they work well at lowerin your all important egt's and get rid of tha cracked mani good luck

__________________
06 QC 2500 INDUSTRIAL TURBO TST MIGHTY TRANS FASS PUMP ARPS ATS MANIFOLD SPEARCO INTERCOOLER

shakin_bakin · 11-05-2009, 04:17 AM

hmm thanks for the input guys

11-04-2009, 03:43 PM	#1 (permalink)
shakin_bakin Newbie Join Date: Oct 2009 Posts: 5 Thanks: 1 Thanked 0 Times in 0 Posts shakin_bakin's Truck Pics	Exhaust Manifolds? Stock or Aftermarket? The 04.5 cummins i bought has a slight crack in the exhaust manifold. Is this that bad? will it effect it much at all? When I go to replace, should i replace with stock or replace with aftermarket. I have looked at a few different ones, which ones do you suggest if i go aftermarket? Why? Mods on the truck are "2" leveling kit, 5 inch stacks, zoom VRT clutch, Bullydog tripledog with crazy Larry, edge juice w/attitude (used for guages only) pusher intake, Fass 95 GPH, my goals... maybe add some power, keep the MPG's up mainly not towing heavy loads or anything just like the cummins thats all.

11-04-2009, 08:47 PM	#6 (permalink)
TOW THE MARK Cummins Fan Join Date: Sep 2009 Location: King, NC Posts: 56 Thanks: 0 Thanked 1 Time in 1 Post TOW THE MARK's Truck Pics	Manifold i'd go with ats or pdi i have 2 ats on both 04.5 and 06. they work well at lowerin your all important egt's and get rid of tha cracked mani good luck __________________ 06 QC 2500 INDUSTRIAL TURBO TST MIGHTY TRANS FASS PUMP ARPS ATS MANIFOLD SPEARCO INTERCOOLER

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11-04-2009, 03:51 PM	#2 (permalink)
Shibbyutman Diesel Head Join Date: Sep 2006 Location: Superior Township, Michigan Posts: 4,118 Thanks: 0 Thanked 170 Times in 120 Posts Shibbyutman's Truck Pics	depends how deep your pockets are, stock manifolds can be had for 40 plus shipping on the forum here, I think even a used aftermarket you'll be looking at 300-350 still __________________ 2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped , FASS 150/150, and big line kit.

11-04-2009, 04:09 PM	#3 (permalink)
shakin_bakin Newbie Join Date: Oct 2009 Posts: 5 Thanks: 1 Thanked 0 Times in 0 Posts shakin_bakin's Truck Pics	well whats the gain? Does it make it more efficient? help MPG good gain on Torque and HP??

11-04-2009, 04:35 PM	#4 (permalink)
Shibbyutman Diesel Head Join Date: Sep 2006 Location: Superior Township, Michigan Posts: 4,118 Thanks: 0 Thanked 170 Times in 120 Posts Shibbyutman's Truck Pics	it will spool any turbo faster regardless of which one you go with and they will flow more, so that means your top end HP will be increased as well. You won't be using it's full potential however without porting the head and manifold to match which is a step few bother to take. __________________ 2003 Dodge Ram 2500 4X4, PDR Cobra Stage 2 Twins, BD Power 90's, Studs, Springs, Autometers, Dual 7" Black Stacks/rain caps, Banks intercooler, Goerend Full Built Trans, Smarty set to Kill, MP-8, Full DIY CP3 Mod, Rail capped , FASS 150/150, and big line kit.

11-04-2009, 05:53 PM	#5 (permalink)
Quaticman Diesel Freak Join Date: Sep 2008 Location: Waterloo, ON Posts: 664 Thanks: 2 Thanked 5 Times in 5 Posts Quaticman's Truck Pics	I installed a BD pulse flow exhaust manifold last Saturday. The turbo spools a little faster and EGT's are down marginally also. I would say it's a worthwhile upgrade. If you want a replacement '03 exhaust manifold cheap PM me, I have the stocker sitting in the shop. __________________ 03 2500 4x4 RC 5.9 SO; 47 RE billet; ATS flex plate; SMARTY Revo-TNT/Dr. P; BD Super B turbo/exhaust manifold/IC boots; Devils Own; Air Dog; K&N CAI; S&B; MBRP 4"; Mag Hytec; Auto Meter C2 gauges; Quad BF/RP gauge; Fluidamper; rail capped; 455 HP/852 TQ.

11-05-2009, 04:17 AM	#7 (permalink)
shakin_bakin Newbie Join Date: Oct 2009 Posts: 5 Thanks: 1 Thanked 0 Times in 0 Posts shakin_bakin's Truck Pics	hmm thanks for the input guys