Hello. I am new to this forum. I have an 05' 2500 4x4 QC HEMI. All i have done is a leveling kit, 35" BFG mud terrains, 3" Flowmaster muffler and built a CAI. I dont care for the sound of the Flowmaster anymore so i bought a single in 3"x dual 2.5" magnaflow muffler. But before i do this, i was thinking of doing a little experment. The stock diesel exhaust on the new Rams are 4". i was thinking of getting one of these from out of a local muffler shops scrap bin and putting it one my truck. now i know that 4" seems huge for a gas engine, but the new 6.0L chevys come stock with 3.5" exhaust and they have 45 HP less than the HEMI. So, i was just wondering if anyone has ever done this or knows someone who has and can tell me what they think. i am kind of excited to hear what it will sound like. i will either straight pipe it or find an cheap muffler on ebay to get me by for a while. any input would be great. Thanks. phil

 

Perhaps the reason why they are 35HP less is due to the WAY TOO LARGE 3.5" exhaust they have...????

I say you would be wasting your money. Keep your true 3" SINGLE and just spend your money on a high flow "Y" Pipe and long tube headers. Remove your muffler and keep your resonator in place as the actual muffler... this would out perform any HIGH END overpriced exhaust system... and the best part is your stock system is STAINLESS!!!


SPEED SAFE, AIR RAM

 

Point taken. The thing is, i never had a resonator. I like the look of dual exhaust and i have a dual magnaflow muffler waiting. i have been told that dual 2.5" will flow just as good as a single 3". whats your opinion on that? can you recommend a set of headers and a y-pipe to me? thanks

 

am i wrong or is the resonator under the hood? or are there 2?

 

...the hemi hat is considered a resonator...but we are referring to the small muffler looking resonator at the very rear end... the muffler is under the cab....

 

yea...and you would be very upset if you went the 3.5-4" diameter route, you would lose low-end torque big time...you need the smaller size for a more efficient scavenging effect which retains your low-end torque...