The extractor looks okay ....although OBX isn't a really good company to copy as their products are notorious for low levels of quality control and longevity
but still they look okay with somewhat smooth bends and the good thing is that the bends are not crushed
One thing that I'd like to point your attention towards is the ports of the extractor .....if they are not finished off properly they can severely affect engine performance as a lot of volume of exhaust gases are generated with rapid pulses in a 4A-GE at 8550 RPM so the following steps with a good die grinder should be taken while you take off the header wrap(quickly before I forget use stainless steel wires/ clamps on header wrap as they tend not to rust and can withstand high temperature operation.

THESE STEPS SHOULD BE TAKEN TO CLEAR THE OBSTRUCTIONS AND KEEP THE EXHAUST GASKET AS A TEMPLATE TO OPEN UP THE SIZE OF THE OPENING IN THE EXTRACTOR.......AND ALL THREE THINGS
1.HEADER
2.GASKET
3.EXHAUST PORT
SHOULD BE OF THE SAME SIZE FOR OPTIMUM PERFORMANCE



thank you.