just found a set of dyonmax headers out of jegs for a hundered bucks best deal ive found so far anone tried em? they say there good for low and midrange torque and i cant see anything wrong with them just wondered if anyone had any expiernece with dynomax.

 

Yep. Got them. Like them.
The header gaskets they supply suck though.
What year and series truck are you putting them in?

 

puttin em on a 66 352 half ton. why do the gaskets suck?

 

They should fit fine. You will have to jack the motor up up get them in.
My gaskets got brittle and I blew out pieces.
Some people have had luck with thicker gaskets (who's gaskets I'm not sure), I ended up going with copper gaskets.

 

They may not fit if you have the Bendix power steering gear. Personal experience.

Copper gaskets are popular and easy to come by. My new FPA headers came with a thick composite type gasket that works great, but I don't know where to get something like that other than call FPA.

 

I used the Dynomax Gaskets and a copper gasket at the same time. The gaskets that came with mine were asbestos like tear apart ones, a separate gasket for each cylinder. No leaks so far. I wish I would have gotten the ceramic coated Dynomax’s I just didn’t know they would fit my truck so well.

 

ive got dynomax headers for my 390 also, im useing the header gaskets that came in my Mr. Gasket rebuild kit, im also useing header studs, my 390 goes in the week sometime so i dont know how its all going to work yet.

 

I have Dynomax headers on my 440 Dodge. Been on it about 8 years, so far no trouble.

 

My experience ... was bad. Sold them for 1/2 and ordered FPA. But maybe I was too demanding. I actually want the ports in the headers to match the ones in the head. Most people just want them to not leak.

 

cacwby, what motor and application did your dynomaxs not fit on? has anyone else had this problem with dynomax?

 

You did see my post above, right?

 

yeah i saw your post. whats your point?

 

Just that CACWBY isn't the only person who had issues with the Dynomax.

But others have had success with them.

Are you running a bendix steering gear?

 

no, im not runnin a bendix steering gear.did your header ports match up with your heads?

 

They should fit. Manual Steering , right?
Had them on my old 66, manual steering and np435 (motor now in the 72).
As long as you don't have a Hi-Perf 352, I wouldn't be too awfully worried about port match.