Mercury HP525EFI Exhaust
 

What manufacturer does Mercury use for the exhaust on their HP525EFI motor?
I like the swept back design and long primary tubes.
Russ

Re: Mercury HP525EFI Exhaust
 

CMI!! I have a set on order for my new 598" NA motor. They look awesome and make great power in NA motors. They should be done very soon!!!

Re: Mercury HP525EFI Exhaust
 

Wette,
What do I refer to that style as what model?
What do you mean "they should be done soon"?
Is there a lead time?
Did you buy direct?
Can you share your pricing?
Thanks!
Russ

Re: Mercury HP525EFI Exhaust
 

That is called sweeper exhaust by CMI. For a 598 you may want Sport Tubes. The exhaust on the 525 is proprietary to the 525 heads.

Re: Mercury HP525EFI Exhaust
 

I have 2 sets new for sale in the classifieds check it out.

Re: Mercury HP525EFI Exhaust
 

That's good information Andy.
Thanks!

Re: Mercury HP525EFI Exhaust
 

Rick,
Checked out your ad in the classifieds. Is that the going rate for Sport Tubes?
Russ

Re: Mercury HP525EFI Exhaust
 

When I called CMI they said about 4,900.00 a set new, just like the ones that come on the merc 525.

Re: Mercury HP525EFI Exhaust
 

Did I understand you correctly, the heads on the 525 are a special design and the pattern on the headers will only fit a 525?

Re: Mercury HP525EFI Exhaust
 

I see the "E Tops" advertised for less than 2K. What is the difference between those and the ones that are $4900? Is there a performance difference?

Dave M.

Re: Mercury HP525EFI Exhaust
 

The heads on a 525 are made by Edelbrock, and unless they did something different just for a 525 which I seriously doubt, any BB header should fit. They prob raised the ext ports like the Merlin heads are, but the port location and header bolt pattern are the same. But...stranger things have happened. Might call Edelbrock to confirm. The cmi's prob have 32" runners vs the short runners the E tops have. I dont think they make the 2 piece split tubes any more.

Re: Mercury HP525EFI Exhaust
 

When I talked with CMI,The 525 headers will also fit the 500 HP heads also,The bottom 4 holes are the only difference put the 500 HP header gasket up to the header and drill 4 new bottom holes in the 525 style header, Then they match perfectly to the 500 HP heads, Per CMI.