NO REFUNDS - All Sales are final on all throttle body boring!

NOTE: **Please understand the build times are a three week process, possibly four weeks.

CORES MUST BE RELATIVELY CLEAN TO SHIP and in good condition. Can not be rusted or corroded or non-functional. If they are in bad condition, it will cost more for the overhaul services. You will be notified before service is performed.

·       Boring services are for the CFI Rochester 400 units.

·       Basic services are performed on all CFI 82-84 units. (Service still to be determined)

·       The services listed below are performed on your cores.

·       We only bore the CFI bases to 2.0" and 2.15" which is Boring Service #2.

·       Shipping is an additional cost. We use USPS Large flat rate box to USA only. International is at an extra cost.

·       Please understand that CFI units are a quite a bit more labor intensive/time-consuming and have more parts than a typical GM TBI.

NOTE: We warranty your product to be free from defects in material and workmanship for a period of 90 days from the date of delivery and NOT date of install. Warranty is for original purchaser and does NOT transfer. If you discover a defect in a product/part covered by this warranty, we will repair at our option using new or refurbished components, or if repair is not possible, replace the item. Absolutely no refunds will be issued. Unit must be installed within 30 days. 90-day warranty on all parts.

TBI Boring Service

Expanded boring service of your TBI (base units only) Please send your current TPS
sensor with your units.

This is the most comprehensive performance boring service ever offered for the CFI community. The following is a detailed description of what we do to make your CFI throttle bodies outperform any other that has been on the market. We use a Bridgeport milling machine and Criterion boring head with carbide inserts to perform the boring process to precise tolerances.

Service#1: 2.0" Boring

1.  When your units arrive, we fully inspect them prior to disassembly.  We bag and tag your parts.

2.  Units are completely disassembled and ultrasonically cleaned.

3.  All parts are glass-bead blasted. Threads are cleaned/chased and all openings are cleaned with an appropriate size round stainless brush including vacuum ports.

4. Throttle shafts are thinned on the bottom as well as opened up on the blade seat surface to accommodate the larger blades.

5. Shafts are drilled and tapped for a stainless button head Torx-Plus screw

6. Base unit balance ports are prepped for installation of balance port tubes. Ports are milled then filled with a 2-part epoxy and balance port tubes installed. A 24-hour setup time is required before any further machining can be done on each unit.

7. Next step is a 1.5-hour multi-step boring process to open up each bore to the exact dimensions specified in your order. This multi-step boring allows us to provide you with the most accurate bore dimensions and the smoothest bores possible.

8.  Each base is installed in a custom fixture to resurface the bottoms. We use a 2.5" Kennametal index-able face mill for this process.

9.  Next we perform a multi-step reaming process on the throttle shaft bores. This allows us to achieve an accurate reaming process of the bores to fit the double-sealed needle bearings.

10. Installation of the needle bearings is a tedious and time-consuming process. Once installed, we insert a 3/8" stainless rod in to each unit to hold the bearings securely while we use a 2-part epoxy fix them in place. A 24-hour dry time is required before further handling of the units is done.

11. Shafts and springs are now painted/coated with a chemical resistant paint and/or clear coat. This is not resistant to carb/brake cleaner.

12. Installation of shafts and springs is next. Custom laser cut 6061-T6 blades are installed and screws are secured with a permanent LocTite. These blades have been anodized and laser-etched.

13. Blade angle and gap is set on each unit to ensure the closet possible fit to make sure they are as close to being matched as possible.

14. Installation of your TPS is now performed and voltage is set to .525V. We will do everything that we can to "balance" each unit as close as possible before they are shipped.

COST: CFI 400 Style 2.00" ~ 50mm $900.00 per pair

** NOTE: BEST WAY AND CHEAPEST WAY TO SHIP TB BASES IS USPS MEDIUM PRIORITY BOX. ALSO…ADD INSIDE YOUR SHIPPED BOX YOUR: SEND “ONLY” YOUR TB BASES TO:

XFire Performance
80 W Windsor Dr
Gilbert, AZ 85233

ADD INSIDE YOUR SHIPPED BOX YOUR:

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