My friend has a 240 (S14 Zenki) red top, greddy front mount, greddy boost cont..thats it. Lately ive noticed his cold pipe is actually pretty hot. It runs fine when first start up or its cold outside, when it runs bad it misses up top, around 5 grand starts to miss. We drove to atl no stops from the bottom of georgia (3hr) fine, stop picked up my engine turned and drove back no stops, 50 miles down the road starts to miss at 4k, then 100 later at 3k. Feel cold pipe and its hot as expletive, so is it heat soaking thats causing that? Ran fine next morning till afternoon. 8-14psi boost, usually only 8. stock everything. Except Walbro 255, non hp.