Dynomax, you get points for creativity
 

but I really doubt that spring is going to last long...

http://dynomax.com/mufflers.php?muffler=vt

Not only that, but nearly half the muffler is dedicated to the valve. What a waste of space.

don't the vettes have that?

I think it looks neat. I've had good experience with Dynomax mufflers so hopefully the quality will still be there.

If it works, this would solve a lot of problems with the G8 crowd. It's incredible hard to get a drone free setup when changing even just the axle-back (rear mufflers & tips). Gets even more difficult when you do the whole exhaust.

Mine is really close to being drone free and it includes a pair of Dynomax ultra-flo's. Best setup I've had on the car to date.

Too gimmicky for me...

Corvettes NPP exhaust uses a vac system that opens valves in the muffler to divert gases throught the muffler.
This is just a spring

Yeah, that is my beef with it. With all of the water vapor going through a muffler I can't imagine it lasting long. It would still work I guess, but not as good.

After 6 -12 months of water vapor and other misc. debris i can just imagine the spring getting all rusted up and seizing or snapping altogether...

Yah, just put Kroil in your gas, it will clean the spring.
Maybe the spring is stainless?

They do say that it has a limited lifetime warranty....wonder exactly what that covers.

- Justin

walker/dynomax LT usually covers only the part in question. So the muffler, but not clamps, labor, etc. We hever had a warranty issue with them I remember as long as you had paperwork.

I'm interested in this. I'd love to have a more aggressive full throttle tone and a quieter idle. I don't drive my car daily, so I'm not so concerned with long term durability.

The warranty covers 90 days. Day 91 it'll break, sounds like a GM story/part

I had to look, I thought I saw LT yesterday.


# Limited Lifetime Warranty.
# 90 Day Performance Guarantee.

Performance & Sound Guarantee
We challenge you to try our DynoMax® performance mufflers* risk-free for 90 days - if our products* don't meet the challenge, call us for your money back.

90-Day Risk-Free Trial Offer
Try qualifying DynoMax® products* for 90 days. We guarantee you'll experience the DynoMax® performance difference! If, for any reason, the qualifying products* don't live up to your expectations within the first 90 days, replace the products and we will refund your original product's purchase price (which shall not exceed the manufacturer’s suggested retail price), plus labor (up to $50 per exhaust system). We're that confident you will be satisfied with DynoMax® performance products! For questions about this offer, please contact our customer service department at 734-384-7898.

*Offer limited to the purchase of DynoMax® Stainless Steel Cat-Back Systems and Ultra Flo™ SS Polished, Ultra Flo™ Welded or Super Turbo™ performance muffler. This offer does not include products which have been modified, improperly applied or installed on vehicles used for commercial or racing purposes. Valid only on vehicles used for private, non-commercial use and may be withdrawn at any time.

Limited Lifetime Warranty (limited to qualifying DynoMax® products only)
Tenneco Inc. warrants qualifying DynoMax® products against defects and wear-out when used on private passenger cars and light trucks under normal operating conditions for as long as such original purchaser owns the vehicle on which they were originally installed.

It looks like the spring is in a sealed chamber of the muffler and the exhuast pipe shown is a cut away view. In that case, the spring should be fine

I see angry people in the near future

Why?

Eh big deal there are systems for euro cars that have different settings you can switch on and off from inside the car