I've just installed an aftermarket SRI in my otherwise completely stock 'rolla, and the fit was perfect, even the Air Flow Sensor had a snug fit. The sound was legit, just the way SRI should sound. However, and here's the problem, when I took it out for a drive, I found that I had lost ALL power across the rev range in EVERY gear. For eg, I'd pull away normally in first, but in second I'd floor it and the car would take ages to reach three thousand, four thousand and eventually five thousand, when I usually shift up to third. And the same problem in third gear, and fourth. I didn't quite understand this, so I re-installed the stock filter and manifold and there you go, the power was back. I can upload pictures of the stock manifold and the new SRI if that would help, but I don't have either right now as I left the car at my brothers. Pictures can be available tomorrow if anyone thinks they might help, but I'm willing to bet that someone here has had this problem as well, and I hope to Allah that someone has a solution here as well. I'm not trying to end up in the fastest 'rolla around. I just want a solution to this problem, which was a pretty straight forward mod in my opinion, and this problem was entirely unforseen. Any suggestions? Or are you experts going to wait until I've upped pictures of the old vs new manifold and filter? Thanks for your time my friends, and peace to you all.