I installed new mufflers on the Capri – I went with the Dynomax VT’s! So far I love them! I also went with a stainless Bassani X-pipe and stainless flow tubes and tailpipes from American Muscle.
Below is my review of them…
I wanted to try to get rid of the drone I was experiencing on the highway…wanted to quiet the car down a bit overall too if possible. After some research I ended up going with the Dynomax VT mufflers. They have a small flap inside that when idling or at a constant speed closes causing the airflow to be redirected – hence quieting the car down a bit…It opens fully at WOT so no performance is lost…in fact these are said to flow more than twice what the Flowmasters flow (841cfm compared to 373 cfm I believe).
I went with the 17959’s (listed for a single exhaust setup) because their tech support recommended them for my big cam setup…apparently this muffler has a stronger flap…
Also pictured is the rest of the stainless exhaust I put on – featuring a Bassani x-pipe!
Decibel levels: (NOTE – decibel levels were measured using an app on my phone – but I tested it and it’s consistent with various sounds – same phone used for before and after.)
App is called AndroSensor free on the Android market…It’s got a ton of sensors but the decibel meter is all the way at the bottom…
2200 rpm’s in 5th gear windows up:
Before: Just under 80db
After: 68db
2000 rpm’s in 5th gear windows up: (not too much of a difference here but definitely NO drone!)
Before: just over 70db
After: 67db
Idling standing 5 feet behind:
Before: just over 70db
After: 61db
Overall, the mufflers sound the same under WOT but idle and cruise is definitely quieter…I love the new idle…a little raspy I think…
Now on to the vids!
Idle:
Idle, walk around, rev & backup:
Idling before (Flowmaster 2-chamber mufflers):
Launching and going through the gears:
Before (Flowmaster 2-chamber mufflers):
And just for fun some rev limiter action:
And some in car action of the above 2 clips!:
In Conclusion:
Overall I like the new mufflers – Install was straightforward and they are nicely made. I will report back with any new info after further use and some longer drives.