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#1 |
An American Soldier
![]() Join Date: Feb 2005
Location: Grumolo D' Abadessee, Italy
Posts: 503
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Okay, I bought the LMC dual exhaust system. The pipes are not labelled, so I don't know which is left and which is right. I think Solver put one of these on. I know i can figure it out by trial and error, but if someone knows, I'd appreciate some help.
Both pipes appear to be 61 inches long, but one is shorter going up to the manifold. I'm thinking this is the Left side that has a heat riser attched to the exhaust manifold. Also, anyone know how much of the pipe you are supposed to cut off to fit the system on a SWB. The instructions just say you have to cut the pipe. Uuuughh
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Dan dan.brue@us.army.mil |
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#2 |
Registered User
Join Date: May 2005
Location: PA
Posts: 2,696
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Re: LMC Exhaust System
What's the difference in length between a LWB and SWB truck? 20"??? That's how much I'd cut off.
Edit: I think a SWB is 20" shorter... Last edited by Jim_PA; 10-28-2005 at 03:57 PM. |
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#3 |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
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Re: LMC Exhaust System
B4 you cut anything, lay it all out under the truck and see where its going to go. You can usually tell then, where you'll be needing some doctoring. And like everything else, measure twice, cut once. Good luck, Jeff.
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#4 |
Registered User
Join Date: Sep 2000
Location: denton, tx, usa
Posts: 176
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Re: LMC Exhaust System
Roughly how many miles per gallon do you think dual exhaust can add over the stock single pipe system?
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69 SB GMC LWB Fleetside 350, 09 Pontiac Vibe 2.4 liter |
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#5 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: LMC Exhaust System
My MPG did not change much when I switched from single to dual on my 307. MAYBE +1mpg. But I can feel about 15+ hp!!!
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#6 |
Registered User
Join Date: May 2000
Location: Storm Lake, Ia
Posts: 1,449
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Re: LMC Exhaust System
If you want I can email what pics I have of mine . About 8 pics very high res.
I couldn't believe they couldn't label them either. tried 2 or 3 times before I got it to fit right. My truck already had the pipes coming off the exhaust manifolds and going back so I used those. So I can't tell you how much to cut off. Let me know and email me at solver@evertek.net and I will reply with pics
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: LMC Exhaust System
SWB is 115 inch wheelbase, the LWB is 127... You'll need to cut off 12 inches. I have been wanting to buy the same set up for my rig too, but have not gotten around to it yet.
As for MPG increase, it will be minimal. The bigger the engine and or the more restrictive your current exhaust, the more increase you'll see, but don't expect it to be anything to write home about. |
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#8 |
Registered User
![]() Join Date: Aug 2005
Location: Philly
Posts: 1,140
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Re: LMC Exhaust System
I was looking at this exhaust myself; seemed like a good price. How do you guys who have it like it?
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#9 |
Its Magically Delicious
Join Date: Jan 2003
Location: oregon
Posts: 2,398
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Re: LMC Exhaust System
same here .. i've been eyeballing that kit for some time now .... its part of my large "to do" list
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71 C10 LWB 350sbc -TH350 12 bolt 3.42 Posi Of all my favorite things to do, The utmost is to have a brew. My love grows for my foamy friend, with each thirst-quenching elbow bend. Beer so frosty, smooth, and cold it's paradise pure liquid gold. Yes beer means many things to me that's all for now cus I gotta pee. |
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#10 |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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Re: LMC Exhaust System
I looked at them, but I went with custom because I wanted 2.5 inch pipes
over the 2.25 lmc offer, also keep in mind for optimum performance 2.25 is only rated up to 250 Horsepower, here is the chart that most muffler shops go by when trying to determine what size pipes should be ran on your rig ![]() *I'm not saying anything negative about them, just saying be sure to do all the research you need first before making a choice on what you purchase.
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T Last edited by LUV2XCLR8; 10-29-2005 at 07:33 AM. |
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#11 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,858
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Re: LMC Exhaust System
More HP means lighter foot/better mileage...Heavy foot/more fun.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#12 | |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: LMC Exhaust System
Quote:
Because my truck was originally a single exhaust truck, I had to buy one hanger for the passenger side. Absolutely everything else you need is in the box. For all you folks worried about buying foreign stuff the kits are made here in MN, out by da-burb's house.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#13 |
An American Soldier
![]() Join Date: Feb 2005
Location: Grumolo D' Abadessee, Italy
Posts: 503
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Re: LMC Exhaust System
Okay, I put it on yesterday. It was pretty easy. I took the old rusty headers and glasspacks and trashed them.
The two pipes coming from the manifolds have different angles with different lengths up. I called Heartthrob Exhaust who makes it for LMC. They also sell them direct and through JC Whitney. They recommended i buy from LMC because they make so many for LMC. LMC is able to give a better price. Anyway, they said the one with the long up pipe was the driver's side. So, I put the heat riser on the passenger side and the two pipes evened out. As far as cutting the convert for a SWB truck...I only cut 7.5 inches off. There is enough wiggle room when the pipes go together, that you don't need to cut the 12 inch difference. Again, I have not been impressed with somethings from LMC. But, this seemed like a good deal. You do have to have ramhorns that turn back on both sides for the kit to work. I got mine at a local salvage yard for $50. I'll try to get some pictures later.
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Dan dan.brue@us.army.mil |
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#14 | |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: LMC Exhaust System
Quote:
And for what is worth, I've never had a problem with LMC.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#15 | |
LAIDOUT
Join Date: Jan 2005
Location: NW Montana
Posts: 928
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Re: LMC Exhaust System
Quote:
Now with the restoration underway I am considering buying ramhorns [old ones both cracked], besides the long tube Hedmans won't work with the new suspension setup. |
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#16 | |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: LMC Exhaust System
Quote:
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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