Ebay headers...updates?

[RandallNeighbour]

I have them on my 97 and my mechanic had no problem installing them. They did give me a nice bump in HP and torque (15 or so) and the Chinese twin chamber exhaust is more throaty than normal.

It was a good mod for me.

[Lobo1186]

see that right there is the reason why. with the 97 as you know has no cats on the headers so no re-flash is needed or aftermarket software. Im glad you are happy with em.. I want to go catless (right now I have only 2 cats headers only) but that software thing will make it tough on me.

[Boxster..S]

hi, I had a 2.7 that I installed a set of header ( B&B)and had lot of problems with cells. I put the same exhaust on a 01 S , 3.2 with a 2.5 cat and extened sensor wires. I also rased fuel pressure .3 bar, the car runs great, +12hp at wheels. PS much better sound and added porsche sport mufler.

[Brad Roberts]

Very interesting!


I safety wire the second set of 02's under the car so they can read "fresh air". Never throws a light. The secondary 02's do not effect the tune of the car and are only looking for cat efficiency (as stated above)

I have done this 20-30 times on the 2.5 race cars running the 5.2 ecu and the 7.2 cars (2.7/3.2)

The later 7.8_40 (997/987) does not like this. Porsche actually dumps a ton of full into the system to see if the secondary 02's exist in the system and throw the CEL if they do need read the predetermined amount of fuel. Porsche does this during normal freeway steady state cruisng


B

[harryrcb]

Originally Posted by Brad Roberts

Very interesting!


I safety wire the second set of 02's under the car so they can read "fresh air". Never throws a light. The secondary 02's do not effect the tune of the car and are only looking for cat efficiency (as stated above)

I have done this 20-30 times on the 2.5 race cars running the 5.2 ecu and the 7.2 cars (2.7/3.2)

The later 7.8_40 (997/987) does not like this. Porsche actually dumps a ton of full into the system to see if the secondary 02's exist in the system and throw the CEL if they do need read the predetermined amount of fuel. Porsche does this during normal freeway steady state cruisng


B

Actually I believe the 7.8 DME was first installed in the 03-04 986 and yes it will throw the cel light (ask me how I know) but some of the header have 2 ports so you can install both o2 and they work fine that way.