I've had my long tubes installed for about 100 miles worth of driving now and my felpro gaskets are leaking and I think I know why, I just wanted to verify this with other jet hot LT owners.

When I got my long tubes in the mail, I noticed that they were'nt D-port matched, they were O ended. Now what I wanted to verify is if any other jet hot LT owners got D port or O port headers. I'm very happy with felpro's gaskets and it's not their fault they are leaking, it's because I've got D-pot heads, D-port gaskets, and O-port headers. But the headers fit and are installed. WTF? The exhaust leak is causing all sorts of power loss from a dead stop run. I don't notice the power loss at WOT. I know I should have asked this WAY before I installed the headers, but I just assumed this was normal. TIA.

 

mine a o also, dont know if the have a D port. i do have a small leak also, but its coused from the bolts backing out. that actually reminds me, i need to check them today. their is a gasket made for ported small blocks, its a little thicker then normal to account for larger ports. i cant remember to part number, but they are designed for trouble headers to prevent leaks. most part stores should have an idea of what you talking about.

 

does anyone know where to get the gaskets that viperkiller is referring to? I want to stick with felpro, I just need the O port gaskets that will fit with the LT1.

 

does anyone have the gasket part number that viperkiller was talking about? I need those gaskets asap, can't really drive the car with all the exhaust leaks...

 

Mine are D ports. I recommend earl's ultra seal gaskets. Solved all my leak problems. Summit carries them. http://store.summitracing.com/defaul...29DA3B&x=0&y=0

Best LT1 gasket made.

 

huh. so your jet hot long tubes are D-ported? like I said above, my jet hots are O-ported and I know all LT1's are D-port heads. I don't get why they sent me O ported headers when they probably knew full well that they would leak when using the normal or proper gaskets. Please confirm that your headers are either D or O ported so I can buy these gaskets you sent me a link to. thanks.

p.s. we have almost exactly the same mods, that's cool.

 

I ran a set of the soft copper ones on mine, and had no problems. It is very important to tighten them often during the first couple heat/cool cycles. Then every time you change the oil just get a wrench on them and snug em

 

My jet-hot long tubes are D shaped....I used felpro#1406 if memory serves.....which are D shaped as well.

 

my slp's are O port. They don't leak. I'm running Mr.gasket Ultra seals.