Repro mufflers and resonators. 2,5" front pipes and rest 2 1/4".
Last summer drove the car with around 9:0 comp ratio, with a comp 268xe. No problem with detonation or pinging, same distributor 18 intial 38 total. stock metering plates front and back.same exhaust. 5600RPM.
I still think the plugs should have more color on them.