Race spec engine

If you run the exhaust as shown the exhaust pulses will colide with each other. the two into one pipe needs the two pipes to be stagered ( one a little before the other entering the single pipe.) this allows the exhaust pulses to push each other and not fight for the same space at the same time! This is my experince with tuned length header exhaust set-ups.

That's interesting. This is an engine built for a customer in Netherlands. I'll ask Geoff from Fourways Engineering as it's his build. I'm actually getting my car restored here and can't resist an beautifully prepare engine.