355 Owners - What’s Your Valve Guides and Manifolds Story?

99 here, 44,000 miles. Both manifolds were replaced around 20000 miles by the dealer.
Zero valve guide issues

 

Yes OEM

 

I do have OEM manifolds, but I am most certainly not a purist lol Image Unavailable, Please Login LOL

 

Guessing they were replaced before you owned the car Ken - is that accurate?

 

Correct, the dates it in my maintenance logbook, but I remember it was at the dealer in atlanta

 

'98 spider. 32k on the clock. Original valve guides and manifolds.

Replaced cats around 25k with Fabspeed recored originals. Replaced bypass with Gothspeed valve at arounf 31k. Rest of exhaust is stock.

 

1995 original valve guides (to my knowledge) no records of them ever being changed. 57000 kms. Changed to Tubi headers at 54000kms pulling of the still intact Original headers as a precaution only, no failure. Cats disintegrated (were OEM ceramic cores) recored with 200 cel metal cats, goth speed bypass valve too.

 

95 with original headers and guides. Burns no oil, and no leaks from headers. I believe that ringing the car up to 8500 on a regular basis leads to accelerated header failure, due to thermal cycling.

 

But so good for eliminating carbon buildup

 

A bit off topic, but is this also an issue for a 348 ?

 

F355Berlinetta '97 55000km
No service history
The headers failed after a day at Spa race track
Replaced them with TubiStyle
No valve guide problems

 

Just buy a 355 Patrick ;-)

 

97 F355b 24k miles- fabspeed headers put on by previous owner- just had valve guides checked during a major and they were replaced at some point in the cars history but still tracking all the records.

 

1995 Berlinetta, currently at 48K
Guides replaced at 36k
Headers replaced same time

 

1997 355 Spider
Headers replaced with new OEM manifolds @ 22k miles in May 2005 (along with Tubi muffler and some sort of aftermarket cats)
Headers replaced in August 2017 @ 39k miles with FabSpeed manifolds and blankets

We have no record of the valve guides having been replaced.

 

95 355 23000 miles. Stock everything. no record of valve guide replacement. Headers in good shape. Thinking of doing cat delete but just inspected cats and they are pristine.

 

• 95 355, 42.5K mi
• Guides replaced in 2008
• Fabspeed headers and hyperflow cats 2008, 2011
• I added gothspeed cv boot shields during 2017 major
• Still unsure what exhaust I'm running, believe it or not. Assume stock. Will eventually replace with a Capristo – you know, "to be sure."

 

I believe you have a challenge exhaust, unless it was changed.

https://www.ferrarichat.com/forum/posts/140694198/

 

Wow, thanks for the reminder. That's the post that zeroed me in on it in the first place!

FWIW then, the challenge exhaust is pretty tame, dB wise. No idea what to expect of course and haven't heard a tubi or cap in person to have any basis for comparison. The actual sound is gorgeous - it's just not life threateningly loud.

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Post some photos, we will be able to figure it out

 

Sure wish I'd taken more during the major when it was out and sitting right there.

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