I'm considering swapping out my cast iron mufflers if I can't get the pinhole leaks in the bottom of them repaired. I have 1991 Crusader 454s.

I seem to recall reading somewhere that the new muffler spec is 5" instead of the 4" we have now. Is that accurate? If so, what's the risk to just replacing everything with 4" (which appears to be several hundred dollars cheaper, especially on hose cost).

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They spec all the exhaust stuff bigger than what Chris Craft used now. I believe the only real problem is possibly a loss of power, but if it's working for you I wouldn't be worried about keeping it the same size. 

You can get a new replica muffler made out of stainless by Kehrig Mfg if that's something you're interested in. I had them copy my cast iron and they sound exactly the same as the cast iron and will last forever. 

https://commanderclub.com/forum/topics/31-exhaust

Every time I drive past Kehrig I think about that discussion. Do you recall what it cost to have them made up (knowing costs have certainly gone up since then, just asking for ballparking)?

I believe they were $400 or $450 each. I remember they weren't a lot more than a good fiberglass muffler. 

Man, that's far more reasonable than I'd expected it to be. I'll give them a call.

Matt if your interested in another alternative,  I went thru all the leg work of having Centek make me a set 5" mufflers that are the the same foot print as the old cast iron ones but with their veratone internals. Id imagine now that they have already made a set , they could probably make another for less than it cost me.  

The part # they assigned to my mufflers is X18026    Veratone MKII 12" x 24" (GC)

They cost about $580 ea.  but again they had time in it to design the first set. 


But, that sound :D 


Find more videos like this on Chris Craft Commander Club


Jeremy Goldstein said:

Matt if your interested in another alternative,  I went thru all the leg work of having Centek make me a set 5" mufflers that are the the same foot print as the old cast iron ones but with their veratone internals. Id imagine now that they have already made a set , they could probably make another for less than it cost me.  

The part # they assigned to my mufflers is X18026    Veratone MKII 12" x 24" (GC)

They cost about $580 ea.  but again they had time in it to design the first set. 


You can buy a Vernatone Mini-Max 4" x 8-3/8 dia. x 16.75 length for $255 each part # 1050400

or a super quiet Vernalift 4" in 4" out,  12" dia.,  22" long  for $363  part # 1500098

www.mesamarine.com

I put Vernalift in my 27, sounds like a diesel now (quiet).

Does the Vernalift put more back pressure on the motor than the regular inline would since you're lofting the exhaust upward?

Jim Frens said:

You can buy a Vernatone Mini-Max 4" x 8-3/8 dia. x 16.75 length for $255 each part # 1050400

or a super quiet Vernalift 4" in 4" out,  12" dia.,  22" long  for $363  part # 1500098

www.mesamarine.com

I put Vernalift in my 27, sounds like a diesel now (quiet).

How do they sound? I know it's heresy to some, but I wouldn't mind quieting the exhaust a bit versus what we have.

Jeremy Goldstein said:

Matt if your interested in another alternative,  I went thru all the leg work of having Centek make me a set 5" mufflers that are the the same foot print as the old cast iron ones but with their veratone internals. Id imagine now that they have already made a set , they could probably make another for less than it cost me.  

The part # they assigned to my mufflers is X18026    Veratone MKII 12" x 24" (GC)

They cost about $580 ea.  but again they had time in it to design the first set. 


I'd post a video / audio but the boat's not in the water just now.

Hard to tell about back pressure, but it's been running fine for the three years I've had them in there. They sit horizontal, so it's not really 'lifting' the water very far. The sound is a low gurgle, briefly interrupted by the gushes of water when it's pushed out. Mine is a single engine 27' with true dual exhaust. A twin engine setup with each engine routed to one transom outlet would probably sound different.  

My new-to-me 28 Sports Express is VERY loud; I will probably install the same setup in it soon (twin 5.7 MPI Crusaders). Wife said she could hear the boat roaring ten minutes after I left the marina!

I have not got a chance to hear them yet as I'm still in the process of a major restoration. 



Matt Penney said:

How do they sound? I know it's heresy to some, but I wouldn't mind quieting the exhaust a bit versus what we have.

Jeremy Goldstein said:

Matt if your interested in another alternative,  I went thru all the leg work of having Centek make me a set 5" mufflers that are the the same foot print as the old cast iron ones but with their veratone internals. Id imagine now that they have already made a set , they could probably make another for less than it cost me.  

The part # they assigned to my mufflers is X18026    Veratone MKII 12" x 24" (GC)

They cost about $580 ea.  but again they had time in it to design the first set. 


  • Just an FYI e basic power has the Vernalift 1500098  at $305.95 plus shipping. They also have the

    •  MUF4MINI for $205.95 and it appears to be identical in dimensions to the 
    • Vernalift 1050400 mini-max

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