GLM products, Exhaust Manifolds

[Joshua Nichols]

Okay so what do yall think of GLM products?? I have found some brand new exhaust manifolds for $699 a set, with everything needed, with guess what? Free shipping.. I love free shipping 3 year warranty.. I am sure I may upgrade the boat by then.. Can't find any reviews on their stuff. So was wondering if anyone has tried them?? I figured I would ask since I almost used Mallory parts till I was educated by folks who know...

 

[bruceb58]

Re: GLM products, Exhaust Manifolds

I have heard hit and miss with them. If you get them you need to really check the flatness of the mating surfaces of the manifold riser joint. Osco is USA made but not sure if thy make the 4.3L manifolds with risers for OMC.

I have contacted them in the past and they gave a prompt reply.
http://www.oscomotors.com/index.asp

 

[paultjohnson]

Re: GLM products, Exhaust Manifolds

Okay so what do yall think of GLM products?? I have found some brand new exhaust manifolds for $699 a set, with everything needed, with guess what? Free shipping.. I love free shipping 3 year warranty.. I am sure I may upgrade the boat by then.. Can't find any reviews on their stuff. So was wondering if anyone has tried them?? I figured I would ask since I almost used Mallory parts till I was educated by folks who know...

Ive never tried em But to repeat gossip, Ive heard more bad then good,reminder ...I am repeating gossip. Free shipping is nice , especially if ya have em replaced once or twice cuz thier defective... How much is a set of OEM or at least Sierra? Is that $699 a HUGE saveings?

 

[Joshua Nichols]

Re: GLM products, Exhaust Manifolds

ummmm OEM well I saw one.. Port side for $799 on Ebay.. Not sure about sierra have yet to check.. Most of the others are around a $1000.. Plus shipping..
Thats a bit of savings.. Update:: Sierra doesn't carry such

 

[paultjohnson]

Re: GLM products, Exhaust Manifolds

ummmm OEM well I saw one.. Port side for $799 on Ebay.. Not sure about serria have yet to check.. Most of the others are around a $1000.. Plus shipping..
Thats a bit of savings

Hmmmmm Tough call.....I guess you have to hope someone with 1st hand experience checks in Good Luck

 

[nimrod69]

Re: GLM products, Exhaust Manifolds

I am one of the unlucky ones to experience GLM manifolds and risers. Stay away!!!!! They are made in China and are junk!. Surfaces are not flat, cracks throughout, porosity, etc.

 

[zbnutcase]

Re: GLM products, Exhaust Manifolds

While I have not used their manifolds, I have used other parts of theirs with less than satisfactory results....

 

[haulnazz15]

Re: GLM products, Exhaust Manifolds

I can also vouch for Osco making good products, but I've heard it's hit or miss with the GLM's. I found the best price for mine at ebasicpower.com, but I don't know about their OMC stock.

 

[Fishermark]

Re: GLM products, Exhaust Manifolds

I've had good luck with Aftermarket Marine. I don't know if they have the specific manifold you need, but if they do, their prices are good. I believe they carry Barr and Osco.

 

[Roman S]

Re: GLM products, Exhaust Manifolds

I have purchased one set about three years ago. I was lucky. Except for a few left over metal chunks from forming process that were clunking around inside, they still work good. Used in sweetwater. Like other above. Need to check the mating surfaces.
RS

 

[Joshua Nichols]

Re: GLM products, Exhaust Manifolds

I contacted them to say what I have heard about their stuff... Naturally no response.. I guess that right there should say something eh?? Made in China... Well so is everything at Wal-Mart.. Can't think of much that comes from China that I bought that was good.. well we did eat Chinese food tonight.. It was pretty good Still not sure what I should do.. $400 is alot of money to go American on something that wears out anyhow.. OEM would be nice.. These on it now have lasted 23 years...

 

[Fishermark]

Re: GLM products, Exhaust Manifolds

Did you look at the link I gave you? A complete set - manifolds and risers and gaskets is only $485. (Plus shipping). I don't know enough about OMC to know if they fit your application or not... but it would be a good idea to check.

 

[Simoniz]

Re: GLM products, Exhaust Manifolds

I put GLM manifold and riser on my 3,0l last spring and they seem OK.

The quality of finish was poor though, there was sand from the casting showing through the paint on the inlet passages and when poked with a screwdriver, lots of paint flaked off revealing loads of sand underneath. I cleaned all the sand off and the metal seemed solid behind though.

I can believe that there can sometimes be problems with porosity.

 

[toolsinbox]

Re: GLM products, Exhaust Manifolds

I dont use their products. I tried... Lord I tried... You should pass on this deal and head for better quality parts. Does the three year warranty include your engine if they leak?

The main issue I have had with them is the fit is always off. From gaskets to risers their stuff is junk. The manufacturing materials used are always of the lowest quality.

Just think how much work it will be to put all that exaust stuff in and the rest of the stuff thats been removed.

then take it all out and do it all over again.

 

[cpt ron jc]

Re: GLM products, Exhaust Manifolds

check out doug russell marine 549 for the kit,free ship,made in usa,stay away from glm,i bought a reman from rapido ,now im looking for risers and exhaust,well risers for sure ,1990 4.3 everything is pretty much rusted,im not even sure i can use my old manifolds,doug russell has good prices good product line.

 

[luckydog49]

Re: GLM products, Exhaust Manifolds

Stay away from GLM. Used them on a small block chevy , one year later , the motor didn't want to idle well. Hard starting, bad exhaust manifold port side, hairline crack in the GLM casting letting water into the cylinders. (50 hours of use). Took both of them of (threw them away)and replaced with a Barr, higher price, huge difference in quality. If I had to replace the motor because of the crack, that would of set me back 3-4K. So the good deal, is not so good.

 

[Joshua Nichols]

Re: GLM products, Exhaust Manifolds

Did you look at the link I gave you? A complete set - manifolds and risers and gaskets is only $485. (Plus shipping). I don't know enough about OMC to know if they fit your application or not... but it would be a good idea to check.

Emailed them today

 

[Joshua Nichols]

Re: GLM products, Exhaust Manifolds

Stay away from GLM. Used them on a small block chevy , one year later , the motor didn't want to idle well. Hard starting, bad exhaust manifold port side, hairline crack in the GLM casting letting water into the cylinders. (50 hours of use). Took both of them of (threw them away)and replaced with a Barr, higher price, huge difference in quality. If I had to replace the motor because of the crack, that would of set me back 3-4K. So the good deal, is not so good.

Info like this is what this forum is wonderful for.. Thanks fellas

Well no dice for GLM... This manifold hunt is getting old

 

[betayv]

Re: GLM products, Exhaust Manifolds

hello I have good luck with aftermarket parts I bought a set of GLM manifolds 3 years ago and they still brand new my boat mechanic was amazed how good they look after that time but, I always flush the boat after being used, one thing check around because I pay less than that I paid like 400$ for my exhaust manifolds and risers free shipping look online and buy it from the best price..

 

[ziggy]

Re: GLM products, Exhaust Manifolds

While I have not used their manifolds, I have used other parts of theirs with less than satisfactory results....

that's where i'm at on glm too.... i'll do near anything not to use glm stuff. bottom of the barrel imho..

i got my manifold and riser from these guys. http://www.perfprotech.com/store/articles/marine-exhaust-manifolds.aspx don't know if they have what ya need. but so far so good with their manifold product (believe i just did my 4th year on them)... made in canada..