GLM alum small block exhaust
#2
Good Manifolds on a Budget
I run them on my 350. About half the weight of the cast irons.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
Last edited by Mariah212Z; 02-10-2012 at 08:09 PM.
#3
Fast Singles Club
Gold Member
iTrader: (8)
I have a set of polished CMI e-tops with dry tailpipes i'll part with . I ran them for about 60 hrs. on my 383 . They also have the spark plug notches in the flanges for Trick Flow heads . Fresh water only . Just in case you may be interested .
#4
Registered
iTrader: (8)
I run them on my 350. About half the weight of the cast irons.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
#5
Registered
Thread Starter
dry risers. open engine bay? what, the manifold water plumbed into a hose and overboard? so these are decent manifolds. came with the boat. 3 or 4 years old. i am guessing between these and the alum intakes there is about 150-200 lbs missing from back of the boat. and this is a tail-heavy little beast. when i owned it 5 years ago, water came in thru the side (think 4winns liberator) exhaust the one week i left it in the water jersey shore and wrecked both motors. now it has thru hulls pouring out over the glass platform. i wouldn'ta done it that way, but i got it back at a price i couldn't pass up.
#6
Good Riser Option for the GLMs
I run them on my 350. About half the weight of the cast irons.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
Sound was improved and mph increase around 1 mph. This speed increase was probably due to weight savings and the fact that they are "semi tuned". The exhaust port runners go nearly up to the riser joint unlike the stock merc manifolds which are just a hollow cavern "Junk" "boat anchors". IMO
You can always add performance SS risers or just use the stock Merc risers.
The weight savings is the best part which if I remember is around 50 to 60 lbs for the both.
http://www.keitheickert.com/p-13413-...imensions.aspx
#7
Registered
Thread Starter
imco has the same thing for about the same price. i don't think there is enough power gain to justify 1500+ dollars. prettier than black merc stuff though...
#8
Platinum Member
Platinum Member
iTrader: (2)
Nothing but good stuff to say about the aluminum manifolds... great weight savings and much better than the stock Merc stuff. I ditched the risers for IMCO units that I picked up used on eBay for a song. Best money I ever spent on the old Stinger.
#9
IMCO Risers
http://www.imcomarine.com/cal_store/...nt-risers.html
What is the difference between the "A" and "SA" versions?
What is the difference between the "A" and "SA" versions?