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YOUR RESEARCHWhat headers are these?
Leading reported evidence
Use oem headers and swap them out
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
My plan is to just buy some used oem headers and swap them out.
Leading evidence: 'Use oem headers and swap them out' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace ill put them back' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
thanks, but i found a set of used ones for 120$ that i just ordered.
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Suggestion · Original poster
If that changes or i notice performance change ill put them back on after the test.
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17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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Outcome without a verified action link
Yep, the old 4 into2 into 1 design, was called the Tri-Y, didn't work well on drag cars, but worked well on road course, broadens the torque curve, came on the early Shelby GT 350 ect.
Hi All,
Long story is i live in SoCal and i went to get my car smogged and i failed only because i had after market headers. It has passed the last few tests with them so i didnt even think about it.
My plan is to just buy some used oem headers and swap them out. Hopefully it is that easy. However i was curious which ones i have because i cant find them anywhere online. There is a good chance someone on here knows
If it helps i have techart exhaust and i believe the stock cats. Car is lowered with Ohlins coilovers.
Please let me know if you know which ones these are. Thanks for taking a look.
Could they be custom made.
If PO spent the money on Techart Exhaust ( I am assuming mufflers) and coil overs, it's not out of the realms of possibilities that they were built.
The length and twist of the collector is really state of the art.
Are there any part numbers or logos stamped on them?
No idea if they work great, but they sure look cool.
PT3
What is tri-y?
I remember back in the late 1970s early 1980s, drag cars experimented with each side of a V8, (2)2 into small collectors, then join them under the chassis.
Never did work.
But don't some of the European/English 4 cylinder sports car have a (2)2 to one design, maybe Alfa and MG cars?
Yep, the old 4 into2 into 1 design, was called the Tri-Y, didn't work well on drag cars, but worked well on road course, broadens the torque curve, came on the early Shelby GT 350 ect. and still see the design around sometimes. It's a good flat torque design, but not a high peak power design.
Tri-Y's can also be tuned for long ovals, but its metric tons of dollars..
Currently Shorty, stepped headers are common in NASCAR.
Dough Thorley probably sold the most of them in the US but not for P-cars..
I have a 94 Jeep Wrangler with one of his headers on my 4Cyl,, bought me a nice solid bump in torque.. The motor was then built, it spins nicely to 6000 now..
@5CHN3LL this is. i messed up and forgot to smog my car last year and it technically hasn't been registered for a year (paid but not smogged). so now i have to go to a STAR place.
@GarretSR5. I will let you know if i feel a difference. The main reason i bought this car was because i think it sounds really nice. If that changes or i notice performance change ill put them back on after the test.
thanks all
I have Agency Power headers on my car, and they look similar in that all 3 main tubes collect at the center (and are equal lengths to that point). The collector doesn't look like yours though...
https://www.enjukuracing.com/product...All%20Products
This is a source reference. Confirm exact model applicability in the original material.
