Duramax Diesels Forum Truck of the Week
Old 05-17-2018, 07:29 PM
Join Date: Jul 2017
Location: Oz
Posts: 70
Default Cast or log RDL headers and up-pipes

I have the LML drivers manifolds and tow flow up-pipes. I am wanting to upgrade to a compound set-up and add more fuel, but cannot decide on weather to go cast or log? Truck is just a DD, and use it on the interstate alot, but I want more...this thing is reliable and a blast but is a my main source of transportation. Please advise; RDL is having a 10% off sale; just want to take advantage of the situation.
Carrillo's, Fingers cast w 37mm reliefs 17:1, ARP, SoCal 3388AF cam, flex-plate, dampner & springs, M/A push rods, DHD y-bridge, coupler & lock-up box, Danville Billet 68R1, motor mounts & water pump, Energy 10mm, 45% over inj, Airdog 4G 165, AFE, Banks, Mag-Hytec, ProFab Tow-flows, MBRP, Magnaflow, QA1, Cognito, McGaughys, CalTracs, TruTrac, AC Delco Extreme duty rotors, LML 20" & Nitto 305/50/20 420's

Motor built by Danville/tuned by Mark
Mike L Built Trans w billet shafts, hub and "K" converter

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Old 05-17-2018, 08:07 PM
Ne-max's Avatar
Ne-max Ne-max is offline
I like turtles
Join Date: Nov 2011
Location: omaha ne
Posts: 2,692


Cast for sure. Don't see the point in log headers.
2006 ccsb Lbz Tow rig
2006 rclb 6.6
The fun stuff. Built motor, trans, triples
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Old 05-17-2018, 09:04 PM
wilsondiesel's Avatar
wilsondiesel wilsondiesel is offline
Join Date: Nov 2015
Location: Sedalia, MO
Posts: 128

Cast has my vote for what youre doing.
2002 LB7 the fun truck
2001 LB7 the beater with wide hips
DD-2001 VW Jetta TDI 5 speed
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Old 05-18-2018, 07:04 AM
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TROJAN366 TROJAN366 is offline
Gold Rush

Join Date: Jan 2012
Location: MASS
Posts: 2,456


I tried multiple set of log headers and had issues with them warping and blowing gaskets. I have cast manifolds now and no issues.
Roderiques ATV Built Motor, HSP Twins, NLX88/Danville72R,
S&S 200s, S&S 10mm & LBZ, Tuned by Danville Performance
Suncoast Competition trans and Goerend Converter
1125hp/1628lbft 10.52@132

Thanks to
Chris @ Roderiques ATV in Westport MA
Mark Broviak @ Danville
Joe and Dave @ HSPdiesel
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Old 05-18-2018, 08:38 PM
wyopoke wyopoke is offline
Join Date: Dec 2015
Location: wyoming high country
Posts: 22


I'm running RDL's cast manifolds with a Wehril Custom Fab twins setup ( Jordan at Wehril is top-notch). Wishing I had gone with Rick's log manifolds. Wrap the manifolds whichever you decide on, also get RDL gaskets. Using Levi's turbo/up-pipe blankets. Rick is great to work with and will answer all your questions without selling you things you don't need. My 01 LB7 is a DD.
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Old 05-19-2018, 10:34 AM
Join Date: Jul 2017
Location: Oz
Posts: 70

Thanks everyone, I pulled the trigger on the cast set-up!
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