JBA 04-15 Nissan 5.6L VK56DE Oval Port 1-5/8in Primary Raw 409SS Cat4Ward Header

They work great, welded some cat's to em and they brought a nice deeper tone to my 04 titan. The only downside that I can see of this product is having to uninstall the manifolds. If you do not have a welder to heat one side of each nut on the mounting bolts, it can be a real pain and you run the risk of stripping the nuts. That dipstick can be a real pain as well. If your OEM gaskets are still good, you can re-use them and save yourself some work on re-tightening the nuts as they're already broken in. I'd still check em though to be on the safe side.

California Air Resource Board legal! My stock manifolds cracked and needed to be replaced. The dealer replacements were excessive in price because they are only sold with attached catalytic convertors. Why should I have to replace the the catalytic convertors if they are not the problem? Hire a professional for the install of these JBA shorties (it is time consuming on the Titan) and reuse your existing catalytic convertors. You will save money when compared to the factory dealer replacements and you will improve the performance of your Titan. With the money I saved I purchased the best cold air intake, (also CARB legal), and still had money left when compared to the dealer quote!

Worked great on 06 titan with cracked manifold. Truck has 62000 miles and they cracked. Anyhow, about 7 hours labor from my shop. 4x4 is really pain in rear. Make sure engine mounts are really retightened. Mine worked loose and started to pop. Just tightened back and all good. No more card in spokes sound. just have factory cats cut off manifold and welded onto headers. It details in instructions where to make cut. 900 total with install. Cheaper the 1300 a side for just the factory parts.

I had a cracked Exhaust manifold on my Infiniti QX56 (common problem on the Armada and Infiniti) so I bought these to replace them... well the item came but it was a little more work than the shop thought because they had to weld the cats to it, which it should have came with some flange or something. Anyhow... it does work great and solved my problem.

Got them professionally installed, but they're a great product.