Stainless T3 Turbo Manifold for Mercury Cougar (1984-1989) 2.3L

High-Flow Stainless T3 Turbo Manifold for 1984-1989 Mercury Cougar (Fox)

What it Does: The Stainless T3 Turbo Manifold replaces the restrictive factory cast iron manifold on the 1984-1989 Mercury Cougar to decrease exhaust backpressure, accelerate turbo spool, and withstand elevated exhaust gas temperatures.

The Stock Mercury Cougar Exhaust Restriction

Factory log-style cast iron manifolds on the turbocharged Lima 2.3L engine suffer from severe directional bottlenecks and uneven runner geometries. This rough internal casting causes exhaust reversion, uneven cylinder scavenging, and severe thermal retention. Under repeated thermal cycling and increased boost pressures, the brittle OEM iron structure is prone to hairline stress cracking, warping at the head flange, and choking high-RPM volumetric efficiency.

The Engineering Solution

Constructed from mandrel-bent 16-gauge (1.5mm) 304 stainless steel, this tubular assembly incorporates smooth 1-5/8 in. (42mm) primary runners to optimize exhaust pulse velocity directly into the turbine housing. Every joint is precision TIG-welded to handle intense thermal expansion without cracking. The cylinder head mating surface features a 7/16 in. (11.5mm) laser-cut flange, hydraulically flattened to eliminate exhaust leaks under load. Designed with a versatile T3 side-mount flange, it accommodates factory Garrett T3, IHI, and aftermarket hybrid turbos.

What's Included

• 1 Stainless T3 turbo manifold
• 1 Manifold-to-cylinder-head gasket
• 1 T3 turbo flange gasket
• Studs, bolts, nuts, and washers hardware set

Technical Specifications

Compatibility

• 1984-1986 Mercury Cougar XR-7 2.3L l4 SOHC Turbo
• 1985-1989 Merkur XR4Ti 2.3L l4 SOHC Turbo

Frequently Asked Questions & Fitment Warnings

Does this fit the Fox Cougar?

Yes, this is a direct fit for the 1984-1989 Mercury Cougar equipped with the Lima 2.3L turbo engine; it does not fit naturally aspirated 2.3L, 3.8L V6, or 5.0L V8 models.

Is mounting hardware included for installation?

Yes, the package includes complete cylinder head and turbine flange gaskets along with a matching stud, bolt, nut, and washer hardware set.

The Mercury Caliber

Engineered for the Fox platform enthusiast, this tubular turbo manifold unlocks true twin-scroll potential, distinct turbocharged exhaust tone, and sustained high-RPM power delivery.