Cosworth Tumbler Delete Housings Top Feed ( Part Number:COS1 20015678)

Cosworth Tumbler Delete Housings Top Feed

Part #: COS1 20015678


Brand: Cosworth
Injector Type: Top Feed
Installation Hardware Included: Yes
Material: Fiber Reinforced Polymer
Tuning Required: Yes
Injector Primary Port Type: Top Feed
Injector Secondary Port Type: N/A
Mfgr. Warranty: 1 year
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
The Cosworth Tumble Generating Valve(TGV) Delete Kit is designed to maximize airflow to your engine by eliminating the obstructions inherent to the OEM TGV intake ports. The TGV delete's are made of a fiber reinforced polymer to insulate the cylinder head from the intake tract, providing your engine with a cooler, denser charge of air.

Produced from fiber reinforced polymer to lower intake air temperatures
Deletes factory Tumble Generating Valve for increased airflow
Free flowing design, port matched to Cosworth CNC Cylinder head & intake manifold
Includes high temp o-rings, shoulder bolts, and shims.
New OEM Subaru injector o-rings included

With the Cosworth Intake Manifold and top feed injectors the TGV delete kit will work without issue on most WRX/STI applications.



Amazing TGV deletes!
Rick C. 2 years ago
If you are wanting to get the most out of your TGV delete, the Cosworth housings are the way to go. The material helps prevent heat transfer into the manifold, they are perfectly smooth inside for optimal flow and they install like stock!

andrew_browning6953470 2 years ago
Great product went together great have a 2011 sti boostin big now
Verified Purchase

Just what i needed
glyne 3 years ago
Its very light compared with the stoch TGV the gains in hp are very noticable i remcommed these highly
Verified Purchase

pricey but worth every penny
2007swpWRXwagon 5 years ago
i bought these for my 2011 STi sedan and i absolutely love them. they install like stock and fit perfectly. i have had no issues with these what-so-ever. and as if perfect fitment and quality wasnt enough you dont need to buy phenolic spacers or have your tgv's ceramic coated with these beauties from cosworth.

  • Q: Delete Compatibility  Subasteve 7 months ago


    Are these housing compatible with Other manufacturers Top Feed Rails, like Perrin's? Only thing required for Top-feed conversion is properly sized injectors (length) and modified fuel manifold correct?

    • A: Unfortunately these have been discontinued, but any OEM fit parts should fit although we have not tested aftermarket rails like Perrin's.

      Stevens Henager 7 months ago
  • Q: Any benefits to having phenolic spacers with the Cosworth TGV Delete Housing?  iamfrozt 1 year ago


    I currently have the Grimmspeed 8mm phenolic manifold spacer. Aside from the benefits of the TGV delete itself as far as air flow goes (which are considerable), are there any perceived benefits or negative aspects to having this with the phenolic spacer as it relates to IAT?

    • A: Phenolic spacers would not be very beneficial for reducing air temps with these TGV deletes because these are made from a material that does not transfer or absorb much heat.

      Zach G. 1 year ago
  • Q: 2011 WRX (Non-STi)  rkylehiemenz27980 1 year ago


    Is there an available TGV Delete for the 2011 WRX, or is this compatible too?

    • A: There is not an available option for the 08-14 WRX from Cosworth.

      ryanw20299728 1 year ago
  • Q: I Need Advice  Shane Hollis 2 years ago


    I can't find TGV deletes for my 2005 sti. Do you think these will fit? And do you know anyone that makes deletes for my subi? This is the one part I'm having trouble finding.

    • A: We do not have the ability to confirm fitment, but if you were to switch over to 07+ top feed rails and injectors you should have no problems using these.

      Nick S. 2 years ago
  • Q: Replacement  Adam.T 2 years ago


    Do I need to replace anything else to apply these to my stock 2011 sti?

    • A: The vehicle will need a tune once installed but other than that all other OEM parts are used.

      Nick S. 2 years ago