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Message: <blockquote data-quote="alvin24" data-source="post: 3448428" data-attributes="member: 63">Joe Mirage,Try put two extractors side by side... if the 4-2-1 looks exactly the same, it is likely that u won't be able to feel any difference. If the configuration is slightly different (for example, the '2' is longer), then there could be slight characteristic change. Some 4-2-1 extractors have a longer '2' to help on the high end. If otherwise, both should be about the same... I bet both products are not 'wind tested' to prove that the flow is better anyway. =p So its just the slight configuration change that make the characteristic changes lor... aftermarket 4-2-1 usually have a longer '2' compared to then stock, thats why u feel more power... coz' improve on high end. IMHO, Malaysian made aftermarket products are by 'trial and error', rather than wind tested. Someone gets the idea "lets make the '2' longer and see what happens... "WOW! It helps! Let's sell it!" -LoL-Fadlie,Changing head gaskets are expensive because a lot of work involved. Gotta remove spark plugs, timing belt, gotta remove intake manifold, gotta remove extractor (in order to remove extractor, gotta remove radiator), have to remove all the stuffs in the head (cams, valves, etc) coz' gotta send the engine head to machine shop for skimming before replace new gasket... you say leh? If you are a mechanic how much you think you'll charge? hehe...ACQ2305,The engine measurements all different, so obviously u won't be able to plonk in the head. Injectors can be used amongst all mitsu... injectors are pretty 'universal'... but only mitsu-to-mitsu lar... if u take honda injectors might not be able to use lor (just 'might' lah... depends on whut type of injectors they using). LoL... I not sure of the valve size, if the 4G63 is only like 1-2mm bigger, you could probably bore your 4G9x head to fit the valves as oversized valves. I think only lar... so far never heard of anyone who's done it, but its just an idea. =p T'body i not very sure.. maybe can, maybe not... i never checked before. LoLz... =p Airflow can la i knoe, but not much point. A lotta GSR use EVO airflow, but u need to use the ECU along with it.This is coz' EVO airflow is less restrictive. =pBump: Joe Mirage,Try put two extractors side by side... if the 4-2-1 looks exactly the same, it is likely that u won't be able to feel any difference. If the configuration is slightly different (for example, the '2' is longer), then there could be slight characteristic change. Some 4-2-1 extractors have a longer '2' to help on the high end. If otherwise, both should be about the same... I bet both products are not 'wind tested' to prove that the flow is better anyway. =p So its just the slight configuration change that make the characteristic changes lor... aftermarket 4-2-1 usually have a longer '2' compared to then stock, thats why u feel more power... coz' improve on high end. IMHO, Malaysian made aftermarket products are by 'trial and error', rather than wind tested. Someone gets the idea "lets make the '2' longer and see what happens... "WOW! It helps! Let's sell it!" -LoL-Fadlie,Changing head gaskets are expensive because a lot of work involved. Gotta remove spark plugs, timing belt, gotta remove intake manifold, gotta remove extractor (in order to remove extractor, gotta remove radiator), have to remove all the stuffs in the head (cams, valves, etc) coz' gotta send the engine head to machine shop for skimming before replace new gasket... you say leh? If you are a mechanic how much you think you'll charge? hehe...ACQ2305,The engine measurements all different, so obviously u won't be able to plonk in the head. Injectors can be used amongst all mitsu... injectors are pretty 'universal'... but only mitsu-to-mitsu lar... if u take honda injectors might not be able to use lor (just 'might' lah... depends on whut type of injectors they using). LoL... I not sure of the valve size, if the 4G63 is only like 1-2mm bigger, you could probably bore your 4G9x head to fit the valves as oversized valves. I think only lar... so far never heard of anyone who's done it, but its just an idea. =p T'body i not very sure.. maybe can, maybe not... i never checked before. LoLz... =p Airflow can la i knoe, but not much point. A lotta GSR use EVO airflow, but u need to use the ECU along with it.This is coz' EVO airflow is less restrictive. =p</blockquote>

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