Exhaust Manifold & Gasket Kit for Jeep 4.0L (1991-1999) - Stainless

In this review the focus is on a direct replacement exhaust manifold and gasket kit designed for Jeep 4.0L inline-six engines built between 1991 and 1999. The bottom line: this kit is for owners who need a straightforward, exact-fit replacement that improves pipe durability with stainless steel tubing while keeping flex joints and the flange in standard steel for thermal expansion. It earns attention because it ships as a complete kit with gaskets, downpipe hardware and a heat shield, so most DIYers can expect a tidy swap that restores function and gives an OEM-like appearance.

Key Features

• Stainless steel pipes: Upgraded tubing resists corrosion better than plain steel, helping the manifold last longer under normal use.
• Flex bellows included: Built-in flex joints accommodate engine movement and reduce stress on the exhaust system during operation.
• Complete kit: Ships with all necessary gaskets, downpipe hardware and a heat shield so installers do not need to source extra parts.
• Direct replacement fit: Engineered as an exact-fit replacement for specific Jeep 4.0L models to simplify installation and alignment.
• Smooth interior: A smooth bore provides better flow characteristics at higher engine speeds for consistent performance.
• OEM part cross-reference: Replaces factory part numbers 33007072 and 4883385 for straightforward parts matching.

Who It's For

This kit is aimed at Jeep owners and independent mechanics working on Cherokee, Comanche, Grand Cherokee or Wrangler models equipped with the 4.0L inline-six from the early 1990s through 1999 who want a replacement that looks and fits like the original. It suits DIY installers who can spend a couple of hours under the hood and prefer a single package that includes gaskets and hardware.

Those who should look elsewhere include owners of non-4.0L engines or vehicles outside the listed years, and drivers seeking fully stainless flanges or aftermarket performance manifolds, since the flange and flex joints remain standard steel to allow natural thermal expansion.

Pros & Cons

Pros

• Good overall fit for many 1991-1999 4.0L Jeep applications, often matching OEM appearance.
• Stainless pipes improve corrosion resistance and visual longevity versus all-steel manifolds.
• Complete hardware and heat shield included saves time sourcing parts for installation.
• Smooth interior and flow-oriented design support stable performance at higher rpm.

Cons

• Flange size has mixed feedback and in some cases may contact the engine block, requiring minor clearance work.
• Flex joints and flange are standard steel, so the entire assembly is not fully stainless.

Specifications

Brand	JDMSPEED
Engine fit	4.0L inline-six
Year range	1991-1999 (select models)
Includes	Exhaust manifold, gaskets, downpipe hardware, heat shield, flex bellows
Pipe material	Stainless steel tubing
Flange and flex joints	Standard steel for thermal expansion
Replaces part numbers	33007072, 4883385, 674-196, 10105812

Our Verdict

For Jeep 4.0L owners who need a reliable, complete exhaust manifold swap without hunting for parts, this kit delivers solid value and an OEM-like fit and finish. It is especially good for DIY installers who appreciate the included gaskets and hardware, though anyone needing a fully stainless flange should consider alternatives. Overall, it restores proper exhaust flow affordably and looks like a practical replacement option.

Frequently Asked Questions

Will this fit my 1997 Cherokee with a 4.0L engine?
Yes, the kit is listed for Cherokee L6 4.0L models from 1991-1999 and is commonly reported to fit 1997 Cherokees.

Are all components stainless steel?
No, the pipes are stainless steel but the flex bellows and flange are made of standard steel to permit natural thermal expansion.

Does the kit include gaskets and hardware?
Yes, the package includes the exhaust manifold, all necessary gaskets, downpipe hardware and a heat shield for installation.