400ex Mufflers Wats Gonna Make A Big Diffrence?

[2004400ex]

I DONT NO WAT KIND OF MUFFLER TO GET I WANT TO GET A POWER BOMB HEADER AND A SLIP ON MY FULL SYSTEM KINDA. BUT DONT NO WHAT THE BEST ONE IS I WANT NICE PERFORMANCE DIFFRENCE.

[RICO111]

I bored my 400 40 over , hot cam stage 2 , and Curtis Sparks full exhaust and it damn near hung with stock 450s . The exhaust made a world of difference and I was pulling a lot of whole shots but top end couldnt compare to the new 450s but in the indoors i competed right along with the 450s because the track was so short . Curtis Sparks is the way to go and its rumble is an eye turner.

[BlingyLTR450]

Go Sparks or CT racing. Or TC racing if you can find a used one.