Product Name:  
WRX Supersonic  
Product Description:  
Fits WRX 01 – 07, WRX STI  
0
1 – 08, Forester XT 06’  
Product Number:  
TS-0205-1315, TS-0205-1216  
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IMPORTANT NOTES:  
Please thoroughly read and understand these instructions before commencing this installation.  
The thread on the cap for the vacuum source is AN#3. The standard swivel nipple can be changed to a AN#3 fitting if desired.  
RECOMMENDATIONS  
Turbosmart recommends that your Blow off valve (BOV) is fitted and adjusted by an appropriately qualified technician  
Turbosmart recommends that a boost gauge be permanently fitted to the vehicle  
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HOW TO INSTALL YOUR BOV  
Please check that the following items have been provided in your WRX STI 08 Supersonic kit.  
Quantity  
Description  
WRX STI 08 Supersonic BOV  
34mm Blanking plug  
½” straight hose joiner  
½” rubber hose  
Use  
1
1
1
1
1
1
1
Model Specific blow off valve  
To blank off standard plumb back hose  
Re-route breather hose  
Breather hose  
½ tee piece joiner  
6mm Hose clamp  
Re-route breather hose  
To secure vacuum hose onto vacuum nipple  
To seal the BOV to the intercooler pipe  
Gasket  
1
.
Remove the standard BOV from the intercooler by removing the two bolts. Disconnect the vacuum line to the top of the standard  
BOV.  
2
.
Using pliers, carefully clamp onto the spring clamp on the plumb back hose and pull the BOV off the hose. Then carefully remove  
the clamp completely.  
1
3
.
Fit the supplied 34mm blanking plug to the plumb back hose  
4
.
Remove the standard hose breather  
5
.
Using the provided ½” tee piece, connect the standard oil breather lines on the left hand side of the intercooler in the orientation  
shown in the picture below and run the provided ½” hose under the intercooler to the oil breather line on the other side of the  
intercooler, using the provided ½” straight joiner to join the rubber hose to the existing breather line on the right hand side.  
½
” Tee piece  
½” rubber hose  
6
.
Install the WRX Supersonic BOV to the intercooler using the standard screws. Re-fit the Vacuum hose, then start up the car and  
check for leaks.  
2
IMPORTANT NOTES ON SETTING THE SPRING TENSION  
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Adjustment to the BOV is made by rotating the cap. To increase spring tension rotate in the direction of hard, marked on the top of  
the cap  
Rotate the cap in the direction of soft to decrease the spring tension CAUTION Do not rotate the cap beyond the red indicator  
groove  
With the engine at idle the exhaust ports should be closed off by the piston the piston should be hard against the seat and not  
floating or moving  
Free rev the engine and back off quickly, the engine should return to normal idle speed if the engine drops below idle or stalls  
increase the spring tension by half a turn  
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Repeat this process until the engine free revs and returns to normal idle speed  
Test drive the car and ensure that when decelerating or changing gears that the engine does not backfire or stall. If backfiring or  
stalling is noticed then check all connections made during the installation, otherwise increase the spring tension  
TROUBLE SHOOTING  
The following points should be checked if you find that your engine is dipping below normal idle, stalling or if the BOV is functioning  
poorly. Please note, the following checks will cure 99% of problems experienced with a BOV.  
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Check the vacuum hose for splits, cracks, loose connection, kinking or any obstruction – old or fatigued hose may collapse  
under vacuum causing an obstruction.  
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With the engine running remove the vacuum / boost hose from the nipple in the cap of the BOV, there should a loud hissing  
sound. The engine should idle poorly, double check by covering the end of the hose with your finger otherwise the hose is  
blocked.  
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Check to see if the BOV is blocked or contaminated with dirt or debris.  
Ensure that the vacuum / boost source is not shared and that the vacuum source is directly from the inlet manifold.  
Check the seal between the intercooler flange and the BOV. Make sure the supplied gasket is installed and the BOV Flange  
is secured on the intercooler flange with the two factory bolts.  
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Ensure the spring clamps are secured on silicon hoses and fittings.  
TURBOSMART  
ONE YEAR LIMITED WARRANTY  
Turbosmart is a company built on Customer Satisfaction and Service. That is why all of our products go through regimented test procedures before they are packaged and shipped. Turbosmart stands  
behind its products for one full year after purchase. Terms of Warranty, Service and Returns are as follows:  
Limited Warranty: Turbosmart warrants its products to be free from defects in material and workmanship under normal use and if properly installed for a period of one year from date of purchase. If found  
to be defective, it will be replaced or repaired if returned prepaid along with proof of date of purchase. This shall constitute the sole remedy of the purchaser and the sole liability of Turbosmart to the extent  
permitted by law, the foregoing is exclusive and in lieu of all other warranties or representations whether expressed or implied, including any implied warranty of merchantability or fitness. In no event shall  
Turbosmart be liable for special or consequential damages. This warranty is only valid on products purchased from Turbosmart Authorized Dealers.  
Service: After the warranty period has expired, repair service is charged based on a minimum and maximum charge rate. (Contact Customer Service for current rate).  
Returns: When returning a Turbosmart product for repair, it must be accompanied by a completed Customer Warranty Form and RMA number. To access this form please go to our website  
www.turbosmartonline.com and you will find it on the Downloads page.  
THE TURBOSMART PLEDGE  
DO NOT USE ANY TURBOSMART PRODUCT UNTIL YOU HAVE CAREFULLY READ AND UNDERSTOOD THE FOLLOWING AGREEMENT.  
Please call if you have any questions or do not understand this agreement. Refer to our brochure, website or catalogue for terms and conditions and further information regarding your product. Turbosmart  
appreciates your business and pride ourselves on our customer service. We are always happy to offer you advice and will provide you with help in any way we can. The purpose of this agreement is to  
avoid any problems or hard feelings.  
We sometimes make mistakes, as do our dealers, distributors and suppliers. Even customers can sometimes order the wrong parts. Do not use, modify, install, trial assemble, nick, drop, scratch or adjust  
any part until you first check for any damage. Damage must be reported immediately. NO EXCEPTIONS. If there are any components missing please contact your authorized reseller immediately upon  
receipt of your shipment. Missing components must be reported within five (5) business days of receipt. Parts returned for any reason MUST BE IN RESALABLE CONDITION. It is YOUR responsibility,  
THE CUSTOMER” to carefully package any returns to avoid shipping damage. Insurance is highly recommended. Credit cannot be issued for damaged goods.  
Turbosmart warranties the quality of the products it designs and manufactures to be free of defects in material and workmanship. This limited warranty is extended only to the original purchaser and may not  
be transferred or assigned. This limited warranty applies to any product, which after careful inspection by Turbosmart, after receipt of the product from our authorized reseller, is found to have a defect in  
either material or workmanship. Any modifications to the product will void any and all warranties and will not be exchanged. Before installation, check new car warranty. Turbosmart is not responsible for  
voiding any original manufactures warranty.  
All warranty claims must be returned to the nearest Turbosmart Office, you must return the product and sales receipt, at your own expense, accompanied by the Customer Warranty Form stating the reason  
for the claim. Proof of purchase must be provided with any warranty claim and will be verified with the authorized reseller from which the product was purchased.  
If all the above procedures are followed, and the product is found to be defective in either workmanship or material, Turbosmart shall either repair or replace the product, at its sole discretion, and sole cost.  
This limited warranty does not cover or apply to any personal injury, labor charges or any other incidental costs or damages caused by the defective product. The individual purchaser acknowledges and  
agrees that the disclaimer of any liability for personal injury is a material term for this agreement and the individual purchaser agrees to indemnify Turbosmart and to hold Turbosmart harmless for any claim  
related to the item of the equipment purchased. Under no circumstances will Turbosmart be liable for any damages or expenses by reason of use or sale of any such equipment.  
THIS LIMITED WARRANTY IS THE ONLY EXPRESS WARRANTY, WHICH APPLIES TO TURBOSMART PRODUCT AS EXPRESSLY GIVEN IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR  
IMPLIED, INCLUDING THAT OF MERCHANTABILITY. ANY IMPLIED WARRANTY INCLUDING THAT OF MERCHANTABILITY AND/OR FITNESS FOR  
A PARTICCULAR PURPOSE IS HEREBY  
LIMITED BY THE SAME TERMS AND TIME LIMITATIONS SET FORTH IN THIS LIMITED EXPRESS WARRANTY AND OTHERWISE EXCLUDED. EXCEPT FOR THOSE OBLIGATIONS ASSUMED  
HEREIN, TURBOSMART ASSUMES NO OTHER OBLIGATIONS IN CONNECTION WITH THE SALE OF ITS PRODUCTS.  
IN THE EVENT THAT THE INDIVIUDAL PURCHASER DOES NOT AGREE WITH THIS AGREEMENT THE BUYER MAY PROMPTLY RETURN THIS PRODUCT, IN  
A NEW AND UN-USED  
CONDITION, WITH A DATED PROOF OF PURCHASE, TO THE PLACE OF PURCHASE WITHIN SEVEN (7) DAYS FROM THE DATE OF PURCHASE FOR A FULL REFUND. THE INSTALLATION OF  
THIS PRODUCT INDICATES THAT THE INDIVIDUAL PURCHASER HAS READ AND UNDERSTOOD THIS AGREEMENT AND ACCEPTS ITS TERMS AND CONDITIONS.  
Happy m otoring!