07Softail

Hell go ahead and put a 5" exhaust on it... I don't give a FVCK!!! RT

A 3" pipe will support 339 HP single pipe and the L-83 pops 355 flywheel HP A 3 1/4 pipe will support 401 HP single pipe a 3.5 pipe will support 468 HP single pipe So you can see a 420 HP L-86 will work perfect with a 3.5 pipe (Optimum) Also the HP is made at 6000 RPM do you drive at 6000 when going to work? No you do not. Build for torque not HP! Torque is what moves you, HP is the side affect of how long the torque is carried. Folks Bigger exhaust pipe is not better. RT

Actually the larger the pipe the slower and cooler the exhaust gasses are unless your engine size and HP level support it. Optimum pipe size is your key not too small and not too big based on you HP level and RPM you drive in. Ideally you want Hot Tight exhaust pulses as far as you can get them down the pipe which aides in scavenging. 2 into 1 exhaust systems are the best for our trucks because each bank of the engine pulls gasses down the pipe like a merge lane on the interstate. Personally I would not go any larger than 3.5" on a daily driver unless you drive your truck Wide open all the time and I doubt that you do. RT

you still have the old muffler? RT

You will be fine. pull a tape measure and subtract 2" from current stance. I have 305-45-22 with no scrubbing. RT

I would venture to guess that the damn valve after the muffler would be the only obstruction causing the minimal BP evident in the testing. Even bolted open there is still that weight on the blade itself that still blocks a bit of flow imo. Can these gauges be rented at an auto store if so I will perform this test being that I will be bolting up some headers soon with the stock exhaust and will be removing the valve completely and I will do a before headers, after headers, with valve, without valve for comparison. RT

I do not have a link. I can't remember what forum I saw it on. RT

Pretty sure it was on the 14's when they first came out. RT

Didn't Black Bear do a test between Performance and stock mufflers and found no gains on the dyno? Someone did at one time not sure who. RT

2WD no vibes, no driveshaft issues, no pinion shims needed either. RT

I did a 3-5 and still no issues. RT

your not gonna have any issues with just installing shackles. RT

But the STOCK exhaust is STAINLESS and paid for!! RT

Or a Hot Tub! RT

Not true I have a 3-5 Drop no vibes and drive shaft issues either. RT

Take the block out too it will still be higher in the rear trust me! Install the shim between the axle perch and spring. RT

LOL...yeah. RT

That has to scrape the inner wheel well! RT

That Rice Rocket threw the hammer down once he got on down the road a bit! RT

Shackles are Shackles RT

Damn Right I would. RT

LMAO!!!!! I'm beginning to think you don't have any of this stuff you talk about!! You need to get installed before it disappears! RT

Well since your LAZY... If you just remove the block it is still not enough drop to level the truck being the block is only 1 1/4" shackles are 2" max drop. RT