Thanks for the pipe sizes... I was just checking because when the car gets back from the cage install I'm having a racing exhaust system built, sans cats, with dual 2.5" OD pipes straight back to two Dynomax Bullet (race only) mufflers and 60 degree turn down tips.

We have a 95 db limit on sound at all race tracks here in CA, so we use a turn down tip to dissipate the sound a bit as we pass the sound check station. I'm hoping the Db will be fine, otherwise I'll have to install glass packs before the mufflers.

PS: I bought another rebuilt 112 engine from Metric Motors and we're going to start working on some internal mods.