Nissan Micra K11 "Race Spec" Performance Manifold

Developed as our more extreme 4-2-1 manifold for the Nissan Micra K11, the GizFab "Race Spec" Performance Manifold uses long, equal-length "curly" primary runners to maximise the available primary length within the limited space of the K11 engine bay.

Manufactured from stainless steel, TIG welded and fully backpurged, this manifold is aimed at customers looking for a more performance-focused exhaust manifold than our conventional 4-2-1 design.

Key Features

• Designed & Manufactured by GizFab
• Stainless Steel Construction
• Precision TIG Welded
• Fully Backpurged
• Equal-Length "Race Spec" Curly Primaries
• Long Primary Runner Design
• 4-2-1 Configuration
• Link Pipe Included
• Direct Replacement for the Factory Manifold*
• Fits 1.0, 1.3 & 1.4L Engines
• Compatible with Distributor & Coilpack Engines
• NOT Compatible with Air Conditioning
• 12-Month Warranty

"Race Spec" Equal-Length Primaries

The defining feature of this manifold is its distinctive equal-length curly primary design.

Packaging a long, equal-length manifold into the relatively small K11 engine bay isn't straightforward. Rather than taking the shortest possible route from the cylinder head to the collector, the primaries are deliberately curved and routed to maximise their available length while keeping the individual runners as equal as practical.

The result is the distinctive "curly" appearance that gives the Race Spec manifold its name.

This design is intended for customers looking for a more serious naturally aspirated exhaust manifold setup where runner length and consistency are prioritised over simplicity and maximum engine-bay clearance.

Why 4-2-1?

The Race Spec manifold uses a 4-2-1 configuration.

Four individual primary runners merge into two secondary runners before finally merging into a single exhaust outlet.

Compared with a typical short-primary 4-1 manifold, a well-designed 4-2-1 arrangement generally places greater emphasis on maintaining useful torque and response across a broader portion of the rev range rather than concentrating the effect towards the very top of the RPM range.

For this reason, a 4-2-1 can remain a good choice for vehicles that see a mixture of fast-road, sprint and track use rather than spending their entire life operating at maximum RPM.

The actual performance improvement will depend on the complete engine specification, intake, exhaust system, camshafts, ECU calibration and other supporting modifications.

Fully Backpurged TIG-Welded Construction

The manifold is manufactured from stainless steel and TIG welded throughout.

During welding, the internal surfaces are backpurged with shielding gas. This helps prevent heavy oxidation and contamination on the inside of the weld, producing a cleaner internal weld profile and improving the quality and durability of the finished component.

This is particularly important on a performance exhaust manifold, where the component is repeatedly exposed to extreme temperature changes and vibration.

Engine Compatibility

Designed for the Nissan Micra K11 and compatible with:

• 1.0L Engines
• 1.3L Engines
• 1.4L Engines
• Distributor Engines
• Coilpack Engines

⚠️ NOT COMPATIBLE WITH AIR CONDITIONING

THIS MANIFOLD IS NOT COMPATIBLE WITH K11s RETAINING AIR CONDITIONING.

The additional space required by the Race Spec primary layout conflicts with the factory A/C arrangement.

If retaining factory air conditioning is important, this is not the appropriate manifold option.

⚠️ IMPORTANT - SLAM PANEL & RADIATOR CLEARANCE

The Race Spec manifold has been designed to maximise primary runner length within the K11 engine bay.

As a consequence of the long, equal-length primary design:

MODIFICATION TO THE SLAM PANEL AND/OR RADIATOR POSITIONING MAY BE REQUIRED FOR CLEARANCE.

This will depend on the individual vehicle, engine position, existing components and manufacturing tolerances.

This is a performance-focused component where primary runner design has been prioritised over completely unrestricted clearance with every standard engine-bay component.

Customers should be prepared for the possibility of fabrication or modification during installation.

If you require a straightforward installation with maximum clearance around standard engine-bay components, one of our less extreme manifold designs may be more appropriate.

Link Pipe Included

A matching link pipe is included, allowing the manifold to connect into the vehicle's exhaust system.

The manifold is designed as a replacement for the factory exhaust manifold arrangement, subject to the clearance requirements outlined above.

As with any aftermarket exhaust component, vehicles fitted with non-standard exhaust systems may require additional adjustment or fabrication.

⚠️ CATALYTIC CONVERTER REMOVAL

Installing this manifold removes the factory catalytic converter from its original configuration.

Removing an emissions-control device may make the vehicle illegal for road use and may cause it to fail emissions inspections, MOT requirements or equivalent vehicle inspections depending on your country or jurisdiction.

Fitment of an aftermarket catalytic converter elsewhere in the exhaust system does not automatically guarantee compliance with applicable emissions legislation or inspection requirements.

It is the responsibility of the vehicle owner and installer to determine the legal requirements applicable to the vehicle.

Professional Installation Required

This manifold should be installed by a suitably qualified professional.

Due to the Race Spec primary layout and the possibility of clearance modifications, the installer should carefully trial-fit the complete manifold before making any permanent modifications.

During installation, check:

• Slam Panel Clearance
• Radiator Clearance
• Cooling Fan Clearance
• Engine & Gearbox Movement
• Wiring & Hose Clearance
• Exhaust System Alignment
• Suspension & Steering Clearance
• Adequate Clearance from Heat-Sensitive Components

Remember that the engine moves under acceleration, braking and gear changes. Clearance should therefore be assessed with sufficient allowance for drivetrain movement rather than simply checking that components do not touch while the vehicle is stationary.

Motorsport, Off-Road & Testing Use

Due to the removal of the original catalytic converter and the performance-focused design of the manifold, this product is intended for motorsport, off-road and testing applications only.

This product is not intended for use on public highways.

The purchaser and installer are responsible for ensuring the vehicle complies with all applicable noise, emissions and construction regulations for its intended use.

12-Month Warranty*

This product is warranted to the original purchaser against defects in materials and workmanship for a period of 12 months from purchase.

Our obligation under this warranty is limited to repair or replacement, at our discretion, where inspection confirms a manufacturing or material defect.

The warranty does not cover incorrect installation, insufficient engine or chassis clearance, damage caused by contact with the slam panel, radiator or surrounding components, excessive engine movement, failed engine mounts, modification, impact damage, accident damage, misuse, overheating, exhaust system misalignment or damage caused by unsupported downstream exhaust components.

Any modifications required to the vehicle for installation, including modifications to the slam panel, radiator mounting or surrounding components, remain the responsibility of the vehicle owner and installer and are not covered by the product warranty.

GizFab Motorsport Developments is an independent aftermarket manufacturer and is not affiliated with, sponsored by, approved by or endorsed by Nissan Motor Co., Ltd.