Diamond Eye 4" Stainless T409 "Offroad" Turbo Back Exhaust W/ Muffler Delete

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Diamond Eye 4" Stainless T409 "Offroad" Turbo Back Exhaust W/ Muffler Delete



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  • 5
    Great product

    Posted by Patrick James on May 6th 2020

    Fit was good, had to make some adjustments, construction quality excellent

  • 5
    1997 7.3 powerstroke

    Posted by Anthony Rogalski on Nov 18th 2019

    Really let the truck breath. You can feel and hear the difference.

  • 5
    Great kit!

    Posted by Mark on Jun 9th 2019

    First, want to thank Clay for calling me back within a few minutes after I contacted with some questions about the kit. Ordered it a few minutes later and it was on my door step in 2 business days. Installed the system with my brother in law. Very easy to install. Hardest part was making room with the firewall for the down pipe. Had no problem with the hangers at all. Need to trim a few inches off the tail pipe but man does it make the truck sound and run great. It's like a whole different truck now. Very pleased and recommend this kit if you want to make your truck run and sound better. Almost forgot...it even made a quieter ride in the cab getting the factory system off. It was a pleasant surprise.

  • 4
    Fast shipping

    Posted by Jim on Aug 13th 2018

    Fast shipping hassle free. And the site is super easy to navigate. Have ordered much stuff from here. And will continue to do so

  • 3
    Could fit better

    Posted by Phil on Feb 19th 2018

    This system is decently priced and makes the truck sound great. Unfortunately it doesn’t fit as well as it should, specifically when going over the axle to the tailpipe. Also, even with ordering a stainless kit the clamps are simple galvanized saddle units. The hangers didn’t seem to have the precise fit the the factor ones had. I don’t recommend using thit supplied clamp for the downpipe. I bought a stainless Donaldson stepped clamp that fits great and seals nicely. I will be upgrading all of the clamps to those units. Overall, a good price but I would have paid more for it to fit better.

  • 4
    Fit was the best for a universal system

    Posted by Mark Pastir on Oct 2nd 2017

    My wife and I had it on in less than a day including cutting and rewelding the hangers. Installed a Jones Aeroflow muffler and black 5" tip, sounds & looks awesome! This system alone has added more horsepower than anything else. The factory system is very restrictive.

  • 3
    Doesn't fit well but sounds great

    Posted by Unknown on May 21st 2017

    I'm only giving it 3 stars. riff raff was fast with shipping and great to deal with. Clay you have a awesome company with great customer service. The exhaust itself didn't fit to well. I pushed the firewall back with a porta power to get the down pipe to fit. This is probably the easiest way to move the firewall.The hangers are pretty generic. They are not really designed for the obs. The clamps on the joints leaked. I had to get different clamps to work. It sounds awesome and the turbo whistle is crazy. I recommend a straight pipe exhaust just maybe a different brand.

  • 2
    Won't fit!

    Posted by Unknown on May 1st 2017

    Exhaust doesn't fix on my 97 obs. Over the axle side exit exhaust doesn't fitake at all. Very disappointed

  • 5
    Sounds great, looks good and overall went smooth

    Posted by Rikk on Apr 14th 2017

    Just a word of advice... If you are getting your truck rustproofed with Godzilla snot or whatever the greasy, waxy, smelly stuff is... DO THE EXHAUST FIRST!! Hard to install an exhaust without it getting everywhere.

    Hangers were a bit of a pain, but they are somewhat generic that will work best for multiple trucks, the system would cost much more if it had hangers that were F250 specific. Not a big deal, they worked and just took a little tweaking.

    The downpipe removal was a pain. Lots of sawzall blades required. Buy a 5 pack and save a trip. I used a small cylinder and a porta power to push in the firewall seam and it was done in 5 minutes without any cutting.

    I put everything in place and held it with jack stands, then snugged the clamps so I could move the pipes but they weren't loose. Then positioned everything to get the best fit and snugged them a little more. A bit of tweaking here and there and gave it a final tightening and it all went on fine.

    The sound when I first fired it was low and mellow, not too loud at all. Nice slight whistle of the turbo. I let it warm up and drove around a bit to make sure the engine was warm then had some fun. When you are up over 2 grand the sound is great, still loud, but roll the windows up and it's not that much louder than stock. At cruising speed, I couldn't really hear a difference. The truck did seem smoother all around the rpm range too. I don't have positive numbers, but I am almost sure it picked up some low end and mid range too.

    Overall, a great system at a great price. Very happy with it.