3 piece exhaust manifold

[hadi]

Has anyone replaced the OEM exhaust manifold for an after market 3 piece performance manifold?
How has performance and EGT's been affected?
Why did you replace that part?

Thanks

H

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98 AMG Hummer,repowered with 99 24v 5. 9L Cummins,4" exhaust,Trorque-pro propane charged, 17"2 piece wheels,37"good-years ATS

 

[Vaughn MacKenzie]

Hadi, a Hummer with a hummin' Cummins? #ad
Now that is how a Hummer should have come in the first place, with REAL diesel power! Got any pictures??

The ATS manifold is only beneficial for those running big turbos and injectors, to realize the improved airflow benefit. They look cool compared to the stock manifold but are kinda spendy.

Vaughn

 

[WeirCummin]

Hadi, Do you take that hummer out wheelin ?
If you get a chance you shouold come to one of the Austin Four Wheelers meetings or outings. Most of the tow rigs in the club are Dodge/Cummins, with a few of us BOMBED. Drop me a line if you are intrested, love to see a HumminCummins. One of the members has a ATS manifold on his truck.
Dean

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Y2K(BD. 11. 18. 99)PW7A BE2L34,(A4OP=ETC/DDX),DMDP w/DSA,AHJ,Autometer Pyro& 50#Boost,STD. PE&EZ,275RV injectors, PSA, Majestic HX40,4"exh. w/Stan's downpipe

 

[John]

I really like my 3-piece ATS exhaust manifold. In addition to having increased flow, it reduced my EGTs a little bit. It is also substantially larger, stronger and heavier than than its OE counterpart. I also won't have to worry about the cracking experienced in numerous OE exhaust manifolds (many of the 12v and 24v exhaust manifolds developed cracks... even ones that didn't have the hole drilled and tapped for the thermocouple). If I had it to do all over again, I'd purchase the ATS manifold in a heartbeat... it's a keeper! #ad


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John Treibel
'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps and accs. , Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, SPA gauges (3), Dynamat, '00 Sport grille and headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake, Amsoil Dual Remote Bypass, Optima Yellow Tops, DD3s and DD TTPM, Aeroquip AQP braided s/s fuel hoses, Banks High-Ram intake manifold and 14 cm2 turbine housing w/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , DTT 93% TC, DTT custom tuned VB, BD modified trans. front pump (enhanced by DTT), Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications