5.4 3v pictures 98% finished

as far as expectations on hp. i hate to throw out pie in the sky numbers.

my best guess until dyno day

factory 300 hp/365 lb-ft

short runner intake with 1 1/2 litre incease in plenum volume and CMCC plate/rod removal = 25 conservative hp. 25 because until i forge the bottom end 5500 is max safe rpm's

high flow 1 5/8" shorty header = 8 hp
exact exhaust dia and length to be determined with strip runs, but it is WAY better than the single exhaust trucks are stuck with. give it another 8 hp to be conservative.

proper tune = 10 hp conservative.

now we all know things don't add up just like that.

so my initial expectations are 325fwhp/385fwtq to 350hp/385tq.

these heads flow right with ls-6 in stock form. ford has claims on airflow i won't quote because they are rediculous. i am not going to sacrifice tq for hp. when companies have custom cams available i am looking for tighter lobe centers. if you saw the lobe speration on these cams, it would piss you off. ford is playing with the exhaust lobes for EGR. they traded serious power for emissions. even 114* lobes will make major gains. ford appears to be letting the flow get them by on power in exchange for emissions. you are seeing scary numbers from 4.6 3v's with just a cam change.