the n/a 4.6 TFS headed SOHC making high 300 wheel is not impressivce to us ls1/lsx fan boi moes tho.(or really to anyone or for any car snce now days standard seems to be 500wheel and even thats slow:Idiots) a cam only ls1 can easily 4-420 rwhp n/a, while not many but some do heads only and are at the 400 mark. now a GREAT combo of both head and cam only can put a ls1 at 480-500 whp. while fords have always had better rears and gm’s have not, stock rears have been into the 10s and better, some are freaks and hold lots of power, but i wil agree with the fact some cant even hold stock power