Hello, I've got a SISO Flowmaster 40 on my 05 right now, and am wondering if it would be beneficial to me to go either SIDO or TRUE DUALS instead. Would I loose any torque or what would be the downfalls or benefits? Thanks

 

the sound would be deeper with the true duels, but either of your choices wouldn't be any more beneficial from what you have already. unless you are bored and just wanting a change, i'd just keep what you have already and put your mod money elsewhere

 

x2..._motes

 

I would go true dual if I could or go with the SIDO to get a little more rumble out of your truck.

 

You're going to loose some grunt down low with a stock engine going true duals...I'd keep SISO...Don't think there's enough difference between SISO and SIDO to justify the cost in changing...

 

Hey thanks a lot, I'm gonna stick with what I got now and next time go for the SIDO set up for sure...save $$ for other mods

 

i speak from experience- i gained from idle to 4k rpms with my true duals-i have over 300 rear wheel footlbs on my 250 horse 2 valve and i maintain that till 4 k rpms- very flat tq curve-granted i went 2.25 and x pipe- but even with my work van weighing 8k lbs and towing 6k- the tq improvement- is very obvious-phil

 

I'm kinda biased I like SIDO coming out behind each wheel.

 

True Duals x-piped sounds much deeper & more rumbling than the SI/DO is, my F250 has a SI/DO with 4" tips, its louder than it is deeper.