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> 1.8L VS 2.0L T4 exhaust systems
technicalninja
post Dec 22 2024, 12:51 AM
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I've wondered why Porsche built different exhaust systems for the T4.

It appears that any year complete exhaust system can be installed on any year T4.

And yet the systems are so different that even the mount at the transmission needs to match the exhaust.

Why?

It seems the systems have the same size pipes.

The 1.8/1.7 have a short "S" kick up at the back that doesn't look like it will affect flow very much.

What am I missing?

Are the 2.0L mufflers higher flow?

Was it just a sound difference?

I didn't "see" an obvious flow difference when I bought a pair of used 1.8L SSI exchangers and the Bursh muffler that fit them.

Was I wrong?




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bdstone914
post Dec 22 2024, 12:40 PM
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1974 1.8 stock heat exchangers have the same tube size as 2.0.
@mb911 might have flow info on stock mufflers
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mb911
post Dec 22 2024, 01:09 PM
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QUOTE(bdstone914 @ Dec 22 2024, 10:40 AM) *

1974 1.8 stock heat exchangers have the same tube size as 2.0.
@mb911 might have flow info on stock mufflers



Sorry long gone information
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