I own a 2003 Mitsubishi Pajero (Montero in US, Shogun in UK) It‘s a 3.8L V6 GLS and I want some more noise from my exhaust. I want more of a growl than a rubbish noise at lower revvs. I‘m planning to get rid of the muffler and install a straight pipe with new exhaust tips since it‘s much cheaper than getting a whole new exhaust system and I can‘t make holes in my muffler either. Any sugguestions and recommendations are welcome. Thanks!
Sorry, but I approach the problem from the other direction. Meaning I look for ways to produce power and the exhaust system is one thing that can be very literally tuned to meet my needs. I say tuned because the exhaust system is similar to a pipe in a pipe organ, the same harmonics that determine the pitch and sound from a pipe organ can create a natural harmonic that will scavenge the exhaust gasses out of a cylinder. Which means that the piston that is on the exhaust cycle meets less resistance doing that job (free horse power in a way). The diameter and length come into play (and built in resonance cavities). If you go with a larger diameter of exhaust pipe, you loose low end torque and gain horse power at high RPM's. But most cars don't turn high RPM's (high meaning in excess of 8K), so most Tuners by going with garbage can sized exhausts and mufflers are defeating the very purpose of tuning the exhaust. Stick close to stock diameter (most cars for street purposes only need about a 2.25 to 2.5 inch exhaust system) and if you have the spare funds try a few different muffler sizes as these by nature are a resonance cavity. Pick the right one and you gain, pick the wrong one and you loose. With some valid tests (set course, dyno runs, fuel mileage comparisons) you will find the best combination for street applications. Keep good notes and documentation on how each change affected car performance, take pictures, then write up a story and summit it to a magazine. If published it will maybe pay for all the parts you went through to find that optimum exhaust system for your make and model.
if u want to stright pipe it then add in a new muffler. by removing the entire system u are increasing cabin nosie and it will get irritating after awhile bc u will be in the lower rpms and it will be ungodly loud and might pop every once in awhile also ure decel will be awful and sound more like ure accelerating,, id stright pipe it with 2 3/4 stainless pipe and run the flowmaster 40 series,, i have used them on a couple of applications and it gives a deep throughty sound and it wont have the very loud cabin noise or the very loud decel noises,,, but ure accel will be deep and mellow a bit higher pitched than the v8 but thats to be expected in any v6 with any exaust system. id also add in a clod air intake,, it will increase ure throttle response and give it a bit deeper sound
i had your same problem i had a 2002 montero and i removed the resonator 2 years ago and straight piped it . now listen BELIEVE ME the noise u'll enjoy it for a while but with time ur friends and colleagues will always complain about the noise from the inside and u will with time . so 1 month ago i bought a flow master 40 series and added it in the middle of the system and straight piped all the way back. BELIEVE me sounds like a evo X much better and quieter in the inside but outside its a BEAST!!! I'm gona upload a video soon to my channel eliasmalak on youtube. but believe get a flow master for 60$ or a mangaflow for 100$ and u will be doing the right thing.
