alltrac

thought it was leaking from flange, but the actual weld on one of the runners has a small crack...what a pain. Car sounds like crap at medium throttle...

tommy25000

Wow I thought Renntech was top notch?

You don't even live where they salt the roads!

alltrac

yeah...i thought so too!!

Acez

pictures of the crack please~!

alltrac

UMMM have to go back under the car...will post as soon as i go under there again

Addicted2Speed

This is not the first time I heard about cracked Renntech headers. IMO, kleemann and Evosport make much better headers (and they make more power too).

mason531

+1

SLK55R

Please seems like everyone has a case of a cracked header. Kleemann had plenty.

Zod

From just reading n memory klee does seem to be in the lead for cracked headers, but thats just info from people that disclosed it, who knows how may other havent

suicidal4life

Kleemann have cracked before

https://mbworld.org/forums/showthrea...acked+kleemann

And although my Kleemann headers have not cracked (fingers crossed) the first set Kleemann sent me was misaligned when welded and had to be replaced.

From reading several posts stainless headers seem to be prone to cracking easier then mild steel. I think EvoSport said that is why their headers were not stainless. Some people have said that ceramic coatings help transfer the heat more evenly on stainless headers and keep them from cracking but I don't know if thats true or not. Perhaps Alltrac should consider coating his headers if he has to remove them to repair the crack.

theeddie

hopefully they refund you coin

sack5000

Get some DTM headers, all others are prone to cracking. I did a quick search of all open forums and found three pages of threads discussing "cracked headers", sheesh. Why bother?

DynamicMotoring

Cracked headers are just due to high amounts of heat, and stainless steel. I dont care who makes them, it can happen. Any knowledgeable tuner will say the same.

ghh429

A properly designed header should not crack under normal use. Thicker runners along with good welding, precision machined flanges, expansion joints, etc. should not crack, especially on non-turbo cars (including S/C) which can better employ slip / expansion joints. That said on the 5.5, I think that motor has so much movement and that may be putting some stress on headers...

Zod

care to show any links?
also what about evo headers any bad word on them?

sack5000

EVO has a good rep, do they have a warranty on them or will they transfer it, just in case they crack?

alltrac

according to renntech, headers are out of warranty...so...5hrs of labor to remove and re-install and another hr for repair...total of $720...oh well

StephenK

How long was their actual warranty???

V12Godspeed

Out of Courtesy they should replace one of them if under a year, Kleeman almost replaced one but I never followed up and provided pictures to Brandon. I guess I was lazy.

alltrac

warranty is 2yrs or 24000 miles. Headers installed in April of 2005...so guess im out of luck