Flowmaster 40 series Delta Flow mufflers on a 03 Crown vic

Stock manifolds and 2" piping.

Category:

Autos & Vehicles

Tags:

• ford
• crown
• victoria
• p71
• flowmaster
• muffler
• exhaust

[TheSleepermgm]

this is just like mine but mine has flowtech afterburners,,,,i was told i would lose some torque because i dont have the tail pipes but i swaped to the h-pipe with flowtech afterburners and turndowns from a single exhaust so i dont kow if i lost any torque,,??,,i do know i gained a shit load of top end torque !! this and my 93oct tune are the only mods that i could realy feel,,everything els was a waist of money unles its all working 2gether as one and thats when i can feel the power the most,,

[rompn4x]

@TheSleepermgm I gained top end power. Don't think I lost any bottom end since I kept stock h-pipe (factory duals). So the ported plenum and 70m throttle body was not really felt? I was planning on upgrading these but now I might just get a tuner and maybe just upgrade the airbox to the 04 p71 version...

[TheSleepermgm]

@rompn4x to tell you the truth i didnt feel the port & polish plenum with the bbk 70mm throttle body that much at all,the only time i could tell is when i was at 70mph and up,so everyday driving its like you dont have it,it could just b the non-pi manifold holding it back? i have read that the non-pi heads have realy bad exhaust flow and all you need 2 do to get great gains out of them is get some head work done on the exhaust valves and some stainless works headers,get a dyno tune no mail tune

[northsiderollers]

mine sounds a little similar on my Lincoln LS. i got the standard 40's. resonator. gotta love it