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pretty sure the only difference between the NPR & NQR is bigger axles and poss bigger brakes. i think they may have tuned the two motors differently but externally and internally they would be the same(that is if they are both 4HE1s-may be tubo on the NQR AND non turbo on the NPR). all the 4H motors are pretty much identical apart from different capacities, apart from the 4HK1 which has common rail and 4valves a cylinder. been wondering wether the head from a 4HK1 would fit on the older models, would have to find some injectors that would fit
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