late saphs ybg cosworths runs three cats closed lambda and would run on 95 ron green top cam covers

but all cossie should be run on 97+ ron as running on anything else will result in piston being melted !!!

i have hear good things about cloosed loop lambda and coil pack conversions on cossie and they have made the car much better on fuel and much better on emissions and have also made it more responsive and benfit from a better burn to