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300 Plus from RB25 for street Hi all , I'm starting this thread to keep the Hypergear one for Taos Turbos and development . Ok well many streeters start out looking for 300 + RWKW and with a fairly typical bolt on build often get to the upper 200s and hit a power wall . As Tao said with the wrong combination of bits in pipes , exhausts and inlet tracts , getting beyond 280 odd can be difficult . Bigger turbos and big wastegates don't often help because they aren't the limiting factor . People understandably try to keep their engine bays stealthy to avoid defects at the roadside lids up debacle . This is where the return flow intercoolers seem good because there doesn't have to be aftermarket pipework . Just recently there have been pics of engine bays with standard looking pipes and claims of 3-400 RWKW . I'm not sure how that works but I'd like to know . Also Tony posted pics of his GTt with the air dam off and a conventional FMIC but with a 90 deg bend and a return tube behind the IC . That tube looks very low BTW , and I'm curious to know what sort of power you made on which fuel . I have the Blitz return flow and my last run on the rollers got a whole 268 on PULP . The previous run a few years back got me 271 but that was with E70 and a HKS GTRS turbo - on its knees . Between tunes I went to the 3076R IDs and a better fuel pump , plus flicked the Jap exhaust for a custom made one with straight through 3" mufflers . Front and cat are 3.5" but I'm beginning to think the 200 cell core was a bad idea so looking at a 100 cell version . Anyone have any idea how much of a real world difference this makes ? Back to Intercoolers . There's a few variations on the cold side pipe and I prefer the one that joins to the standard crossover pipe and lets you keep the std recirc valve . The one with the U bend over the cam covers is set up for aftermarket fart valves which don't interest me at all . If I could find a way to return the flow from a crossflow IC that would be good but I'm a bit concerned about the return pipe being too low . ATM I'm hoping a 100 cell cat and the PWR 300/600/81 IC will get me past 300 wheel wasps with the 3076R on ~ 17 pounds of boost . And on 98 PULP . Maybe better turbos can come later but the groundwork needs to happen first . Any feedback would be good in the exhaust and intercooler/pipework areas , particularly with integrally wastegated builds . Thanks in advance cheers A .