headers vs manifolds
#1
headers vs manifolds
I've got a 21' Donzi that I'm putting a 502 in. original was Merc 454, Borg warner and TRS drive. I'm currently using the stock 454 exhaust manifolds but looking for an upgrade. The 502 has been mildly built, I'm told it will run around 425 hp.
What are the pros and cons of headers vs manifolds? what should I be looking for to replace the manifolds?
What are the pros and cons of headers vs manifolds? what should I be looking for to replace the manifolds?
#2
Registered
iTrader: (1)
I’ll start with this chart.
Engine is Merc Racings HP500 (carbed 502) that all came with Gill Exhaust .
Engine is Merc Racings HP500 (carbed 502) that all came with Gill Exhaust .
#3
Registered
iTrader: (1)
#4
Platinum Member
Platinum Member
iTrader: (6)
you run in salt or fresh water ?
The following users liked this post:
articfriends (03-24-2023)
#6
Registered
I have used almost all of them.
The KE headers are bad ass they sound great had them on my Powerplay and Baja
The SM are ok for stock applications and the gen III are better but the sound is not there.
CMI look great and sound great , price is more than all the above. Have them on my Nortech
The KE headers are bad ass they sound great had them on my Powerplay and Baja
The SM are ok for stock applications and the gen III are better but the sound is not there.
CMI look great and sound great , price is more than all the above. Have them on my Nortech
The following users liked this post:
SB (03-24-2023)
#7
Gold Member
Gold Member
Pictures of boat please.
CMI’s look badass, but as a guy who spent 800 bucks last week having one of my CMI headers repaired I can understand people wanting to go with a different more reliable product.
CMI’s look badass, but as a guy who spent 800 bucks last week having one of my CMI headers repaired I can understand people wanting to go with a different more reliable product.
The following users liked this post:
SB (03-24-2023)
The following users liked this post:
articfriends (03-24-2023)
#9
Registered
I have used almost all of them.
The KE headers are bad ass they sound great had them on my Powerplay and Baja
The SM are ok for stock applications and the gen III are better but the sound is not there.
CMI look great and sound great , price is more than all the above. Have them on my Nortech
The KE headers are bad ass they sound great had them on my Powerplay and Baja
The SM are ok for stock applications and the gen III are better but the sound is not there.
CMI look great and sound great , price is more than all the above. Have them on my Nortech
#10
Registered
iTrader: (1)
Yup. Diamond Performance has them made.
https://www.diamondperformanceparts....ducts/755-8935
They are called Thunder and Lightnings now.
Not sure if covid supply chains effected them ir not.
https://www.diamondperformanceparts....ducts/755-8935
They are called Thunder and Lightnings now.
Not sure if covid supply chains effected them ir not.
The following users liked this post:
Plowtownmissile (03-24-2023)