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| 2011+ LML Performance Parts Discussion Discussion of Performance Parts For the 07 and up LML Duramax Trucks No Advertising |
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11-29-2012, 10:27 PM
| eBay Motors #1 (permalink) |
| Duramax Lifetime Supporter  Join Date: Sep 2011 Location: Atmore, Alabama
Posts: 622
| Help me out deciding between 4" or 5" Exhaust. Ok guys I just got my Mini Maxx today and will be getting a complete exhaust when I get in from this hitch offshore. I have been trying to decide between Pro Flo and MBRP exhaust and 4 or 5 inch... I was told today by one of our vendors that he would run MBRP because it seems a little nicer built but would run 4" because the LML's seem to lose a little low end with the 5". I will be towing a camper and equipment trailer so I want all the low end I can get but was looking forward to the lower tone of the 5" straight pipe.... Also I was leaning towards no muffler...your experiences with this as well if you would. I talked to MBRP today and they should have a wrapped down pipe out by the first of the year as well......
__________________ 2013 Silverado 2500HD Duramax Diesel LML CCSB 4x4 LTZ Trim H&S Mini Maxx (just have to push the button to install) 20" Moto Metal Wheels 33x12.50 Toyo MT's |
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11-29-2012, 10:53 PM
| eBay Motors #2 (permalink) |
| DuramaxForum Veteran  Join Date: Aug 2012 Location: Youngsville/Wake Forest
Posts: 1,550
| Diamond eye or Flo Pro any day over MBRP. I chose 5" simply for the sound but go on YouTube and see what sounds best to you. Sent from my iPhone using AutoGuide.com Free App
__________________ 2004.5 Sierra SLT 4WD CCSB Black/Black Studded, Deleted, Re-Routed FPRV Race Valve LBZ FPR 20x10 ET -12 Fuel Hostage Nitto 420s 305/50/20 All-On Mod MA Pump Rub Kit 3" DE Down Pipe to a 7" Single Mitre Cut EFI Live DSP5 By Kory "Supa Tuna" Willis @ PPEI |
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11-29-2012, 11:09 PM
| eBay Motors #3 (permalink) |
| Senior Member  Join Date: Jun 2010 Location: Southern Virginia
Posts: 839
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__________________ 2007.5 Chevrolet 2500HD - RCLB LT Z71 - Eagle 050 18s with 275/65-R18, blacked out emblems and tool box, EFI LIVE DSP5, 5" Diamond Eye exhaust with 6" tip, Edge CTS Insight, EGR turned off. 2006 GTO - Pacesetter Headers, catless mid-pipe, tinted, painted OEM 18 inch wheels, flowmaster axle-backs, aluminum driveshaft, 0 drop rear springs. 2004 Harley Davidson Sportster 1955 Belair - World Products Sportsman II Heads, 750 Double pumper Holley, Hooker Headers, 305/525 Comp Cam, 4 Speed, Weld Racing Wheels, Edelbrock Intake, MSD, few other odds and ends. |
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11-29-2012, 11:40 PM
| eBay Motors #4 (permalink) |
| Junior Member  Join Date: Mar 2012 Location: Alberta, Canada
Posts: 50
| I have 5" Flo Pro with muffler, and dumped over my rear axle and love it. Not so sure about losing low end torque though. I have my stock tune with the delete, and didn't notice a loss of power at all. I was worries about too much can noise with the 5" (had 4" on my ford 6.0), but there isn't much until you get up around 1900-2000rpm. I cruse at about 1700-1800rpm on hwy. Also, not sure how much of a difference it makes with or without the muffler on the 5"...my muffler is straight through with some perforations on the sides. Sent from my iPhone using AutoGuide.com App
__________________ **2011 4x4 White on Black LML Chevy Silverado LTZ, CC, 6"6' Box. Levelled with a 2" block in the rear, & 275/65r20 tires** First time GM owner - Converted Ford owner, and loving it. |
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11-30-2012, 12:03 AM
| eBay Motors #5 (permalink) |
| Junior Member  Join Date: Dec 2010 Location: Ms
Posts: 219
| The muffler doesnt make that big a difference, I like my MBRP as for the others I couldnt tell since I have never had them. The profab downpipe fit like a glove and was easy to put on just my .02
__________________ Mike Classic LBZ|6"|Toyo AT Custom pearl paint S&B CAI|5" MBRP Exhaust|BD Power Pup|PPE Shim Kit|Profab EGR Delete|Profab DP|LML Manifold|PCV Re-route|Cobalt Boost & Pyro Bilstein 5100 & Stabilizer|Krypto Tie Rods|Moog Pitman|Idler Arms Mag Hytec Diff Cover DMAXSTORE.COM, Your Duramax Diesel-Only Shopping Resource |
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11-30-2012, 05:19 AM
| eBay Motors #6 (permalink) |
| Junior Member  Join Date: Nov 2011 Location: yorba linda ca
Posts: 66
| I have flo pro an it is a really nice kit. I went with 4" because on my lbz I had 5" an it droned on the freeway. I heard an lml with a 5" an i love the sound, with 4" you have a lot more vacuum nose. Sent from my iPhone using AutoGuide.com Free App
__________________ 2012 GMC Sierra 2500hd lml SLT steel gray metallic H&S mini maxx/wild tune Flo Pro 4" straight pipe cognito uca kit level keys limo tint all around! even the windshield 17" walker evans race wheels(black) 305/70/17 nitto terra grapps line x |
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11-30-2012, 05:27 AM
| eBay Motors #7 (permalink) |
| DuramaxForum Veteran  Join Date: Sep 2012 Location: South Whitley, IN
Posts: 1,279
| I'd say get the 5 inch
__________________ The Sound Of Madness 2004.5 LLY ECSB EFI Live, MA700 Trans, Airdog 2 165, MBRP 5" with 6” tip, Profab Downpipe, LML Manifold, LBZ Mouthpiece, AFE Stage 1 Intake, EGR Blocked, PCV Rerouted, Resonator Plugged, ADP Race Valve, MA Rear Housing Support, MA Pump Rub Fix, Rancho RS9000xl's, Amsoil Synthetics, Autometer Cobalt’s Boost & Pyro, Tint (5% back, 20% front), HID's, US Speedo Custom LED Gauge Cluster, Line-X’d rockers To Come!!  :Profab EGR Delete 4094vvt 40% overs |
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11-30-2012, 06:19 AM
| eBay Motors #8 (permalink) | |
| Junior Member   Join Date: Oct 2012 Location: Charleston, WV
Posts: 207
 | Quote:
__________________ 2011 2500HD LML LTZ Z71 CCSB w/ VYU package B&W Tow & Stow | Edge Insight CTS | PPE Diff Cover | RC Steering Stabilizer | WeatherTech FloorLiners Last edited by DLB; 11-30-2012 at 06:21 AM. | |
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11-30-2012, 07:43 AM
| eBay Motors #9 (permalink) |
| Duramax Lifetime Supporter  Join Date: Apr 2012 Location: Casa Grande, Az
Posts: 2,165
| backpressure is a turbo's worst enemy, the 5" won't cause loss of power down low over a 4". That bein' said, it won't give you more power on a LML either as we are still limited on amount of hp these things will make...It comes down to what sound you are looking for
__________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps |
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11-30-2012, 08:41 AM
| eBay Motors #10 (permalink) |
| DuramaxForum Veteran  Join Date: Aug 2012 Location: SLC, Utah
Posts: 1,572
| Only difference is sound. I like my 4" because there is no drone compared to by buddies 5" but the 5" looks way bigger! Haha Sent from my iPhone using AutoGuide.com App
__________________ 2006 LBZ CCLB DRW Suncoast Trans w/ 1056 Billet Garrett 4094 BTLockup Box Built Front End Some More Stuff EFI Live by Starlite Diesel Fastest 1/4 yet: 13.606 (fourth time down the track) |
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