So the RPW headers are 2 to 1 from RPW. You can order manual or automatic versions.
The difference is the crossover pipe from the drivers side to the passangers side to clear the automatic trans.
This is my second set of RPW headers the first cracked and needed to be replaced after 5 years
.
The first pair were automatic and fit like a glove , the 2nd set was by mistake manual
and did not fit without modification which I did cause I didn't want to wait for a ne xover pipe.

Now the JET chip ... You need to send your ECU to them.
They reprogram it and send it back for $399.
I pass smog CA ( except for visual inspection ) with flying collors. The performance is much better
and I got better MPG out of it. It was worth ito me. Steep price though - I wrestled with the
cost factor for a while but could not resist. BTW I have a spare stock ECU so it was not a biggie.


BS AKA Brian Schieck 1990 LWB 3.0L,RPW Hders HFCat,5.29 Gear+Detroit F/R,IronMan Tbars/ Coils,Rancho RSX9000,Dual bouncys,Thunder comp.,FlexALite Fan,Hellroaring DualBattSys,35" SuperSwamper Bogr's,Stage 1 cams,Ported Heads,ECU Jet Chipped