Since we have originally (only) been offering T4 exhaust headers in standard 1.5" od... NOW for the engine builders/racers with 2.2L and larger engines*; these are for you.
* Beneficial as well to the smaller displacement race engines with a big duration cam, larger valves, head work, higher RPM track use.
Mfg here in our Glendale, Cali plant; using only USA sourced raw materials, MSDS standard procedure since 1976.
Mfg.direct pricing so these will not break the bank, watch the 914 FS Classified section for 1.625 header release date in early 2023
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...never Enough projects around this place
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Really like the design of those headers,very well thought out .

@porschetub...gracias Sir, our customers finish off the installations with their muffler of choice, fab up a few light-gauge metal brackets which keep any loose cables off and away from the hot "Snakes"