Heat Exchanger Identification Help

[joseph222]

Below are pics of the flanges where the muffler extractors bolt onto the HE's on my 75' 2.0L.

I'm considering different exhaust options and would like to get a positive identification if these are in fact 75 2.0L, or the 74/earlier style. What do I have? I mean, besides a lot of rust

Other than more muffler options, what is the performance advantage the early style has over the later style HE's? Is there a measurable horsepower difference?

Left side


Right side:

[RustyWa]

Look like early HE's to me. I think it was something like a 7hp gain to the early HE's....someone will know for sure.

[Dave at Pelican Parts]

Those are 73-74 2.0 heat exchangers.

The 74 2.0 made 95 HP (DIN rating). The 75 2.0 made 88 HP (DIN rating). The exhaust was the main engine difference... You do the math.

--DD

[joseph222]

Dave/Eric,
Thanks a lot. You guys just made my day!

Since I've got the early style HE's (love that PO), it looks like I can add the Triad Muffler as an exhaust option. Cool And thanks again for your expertise....