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4-1 Street Design Kit - 4G63/64 16v4-2-1 Street Design Kit - 4G54

4-2-1 Race Design Kit - 4B10/11/12 DOHC

Lancer 4B10/11/12 4-2-1 Race Design Extractor

( Martech Exhaust )
Number Kits in packaging:1
Number Kits in box:1
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Racing Performance Works 4-2-1 designed as the complete "Direct Bolt on Package" meaning no further components or parts are required. You purchase this product and simply bolt onto your vehicle, no welding or modifying is required.

The package includes the RPW 4-2-1 Header and Flex Pipe Assembly. The system is designed to bolt directly up to the original flange point on the stock catalytic converter.

This design is perfect for the customer wanting improved throttle response, fuel economy and improved performance, without planning on having more extreme modifications later.

Manufactured from 304 Stainless Steel they look good and run well designed nearly equal length primary pipes. The best compromise of a 4-2-1 design system for maximum performance and torque improvements.

The 4-2-1 pipes are nearly identical matching lengths for even air flow compared to traditional 4-2-1 systems with unequal pipe work.

This unit is identical in design as what is being marketed as Super Circuit headers by other companies.

Manufactured to suit the following model vehicles

  1. Mitsubishi Fortis / Lancer CJ 4B10 DOHC Mivec 16v 2007+
  2. Mitsubishi Fortis / Lancer CJ 4B11 DOHC Mivec 16v 2007+
  3. Mitsubishi Lancer CJ 4B12 DOHC Mivec 16v 2007+
  4. Mitsubishi Outlander 4B11 DOHC Mivec 16v 2007+ (May require minor modifications)
  5. Mitsubishi Outlander 4B12 DOHC Mivec 16v 2007+ (May require minor modifications)

Currently out of stock of this unit - please wait until status is changed back to available.


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Our websites have been moved to our new host and there are still some minor glitches but mostly worked out. Whilst we are building a new shop site, we have done some security upgrades on this older site which has improved it tremendously. Online registration is being enabled again, produce prices being updated and new products uploaded. We expect this site to be fully updated by the middle of June 2014

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