Janspeed Manifold would add some extra bhp with a full system. Decat hmmm not too sure about that but you could get 5bhp or more from that. Backbox? Not worth it. Powerflow custom made system. Piggyback ECU? Could keep the standard one... Well ermmm here are my thoughts anyway... 1.3 Twin Cam 16v, HKS injector for a fifth injector and Hybrid T25 turbo (360 degree bearings). Uprated head stud kit, K&N induction kit and a decent recirculating dump valve. May be some nice spark plugs as well. 200SX S14 370cc injectors, 2mm head gasket and a decent boost controller. Uprated fuel pump and a oil temp sensor for good measure. Thats about 200 bhp I think for now. HAHAHAHAHAHAHAHAHAHAHA. oops.