Yes, I ran a 4-3.5" alloy step-down with the Forge TIP to the IE intake. The boys at Forge even sprayed it black to match for me when they swapped the inlet!
I've been running Unitronic Stg2 for over 2 years now, I do like the idea of flex fuel too but waiting to see what their Flex-Fuel upgrade involves before I make any changes. It runs just fine on UK 99RON, which is actually a pretty good power for daily. It's about 540hp on a nice cold day...
It's such as odd design. Are you still on the Uni 3" like me? What metrics will you taking before/after to compare?
I now have got hold of the silicone bits to fit the 'bare' RHD Eventuri 4" I bought cheap, so would be useful to also take before/after and see if there's any measurable gains...
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