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No the car has stock manifolds right now (mildly ported and polished). After installing the tubular headers and drove it hard for 2 months, I heard something poping in the engine bay. It sounds almost like a tapping lifter only much louder. I found out it was leaking exhaust gas from the engine bay. OUCH! But I couldn't tell wtf was leaking. So I pulled the engine out again :( and thought the manifold musta crack! And found out that the flange on the passenger side (that bolt to the head) was warped! Almost 5 mm gap from the exhaust port! There's no crack on the piping only the flange was warped. And the driverside is good. My conclusion is that the driverside flange is 2 piece (has a cut between #4 and #6 exhaust port) to clear the oil dipstick, but the passengerside is one piece. When it expand, it has no way to streched but warp :( In all, pulled and reinstall the engine in 2 days. That included polishing the stock manifolds. I just can't wait another couple months for a new set of headers anymore. I did notice a different in spool-up time between the tubular and stock header. The tubular pulls a little stronger and faster spool-up then the stocker.
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