C5 shorty header question LS1 swap
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
C5 shorty header question LS1 swap
I put these headers on my C3 LS1 swap. If you look at these, can you tell if do they require the donut gasket?
It looks like they already have the right flange set-up installed. I thought the C5 OEM manifolds were flat at the ends and the donut creates the roundish shape, like these above style already have welded on.
It looks like they already have the right flange set-up installed. I thought the C5 OEM manifolds were flat at the ends and the donut creates the roundish shape, like these above style already have welded on.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
T T T
Anyone have thoughts on this. The donuts fit into the header exit bowl, but not sure if this is correct for style header.
This is like the JBA old style shorty headers. I'm using them to mate up to my original 2.5 inch pipes on my C3, to help keep the budget in check.
Anyone have thoughts on this. The donuts fit into the header exit bowl, but not sure if this is correct for style header.
This is like the JBA old style shorty headers. I'm using them to mate up to my original 2.5 inch pipes on my C3, to help keep the budget in check.
Melting Slicks
Joined: Nov 2008
Posts: 2,938
Likes: 65
From: Rochester Hills MI
no you not need the donuts. however, it doesnt look like those would seal very well. make sure the mating flange on the h-pipe is nice and clean. the stock donuts are made out of a soft material so it conforms to the flange on the h-pipe. it doesnt appear these would conform very well, so you will need to make sure the surface is clean. if it still leaks, you could try wrapping some gasket material around them. if that still fails, you may just want to cut off the welded on donuts with a hack saw, and install the stock ductile ones.
