TRI-Y headers are 1 5/8" primaries into 2" secondary into 2 1/2 finals. All tubing is 14-gauge steel .083 thick. Gasket-less ball socket couplings are used. Flanges are 3/8" "D" port and CNC Laser cut. Box end wrench can be used on every bolt.

The header tubes are paired in a 4-into-2 into 1 design. The cylinder scavenging is greatly increased by using the exhaust velocity of one cylinder to aid the exhaust velocity of the cylinder it is paired with.
 

For the 91- 93 B-body, add the following to the part number you are interested in:  "LO5".

Item	Description	Price
TY001	TRI-Y Header; raw mild steel	$575.00
TY002	CHROMEX Coating	$275.00
TY003	TRI-Y hook up pipes w/ ball socket coupling (custom system)	$65.00
TY004	TRI-Y extended hook up pipes w/ dual ball socket coupling; bolt in, off-road use only	$90.00
TY005	TRI-Y header package; extended hook up pipes, header nuts and bolts	$665.00
TY006	TRI-Y header package; 2 spiral wound 304 stainless hi-flow converters, header nuts and bolts	$925.00
TY007	304 stainless dumps w/ block-off plates, nuts and bolts	$250.00

* Header Packages w/ Converters: add $55.00 S&H to anywhere in the continental US

* Headers Only or w/ Hook-up Pipes: add $40.00 S&H to anywhere in the continental US

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Currently the TRI-Y headers bolt directly onto the heads with no modification to emissions or alternator
brackets. A box end wrench can be used on every header bolt. The block does NOT have to be lifted for
installation. Removal of the starter is NOT required. These headers fit better than the factory manifolds and
have no clearance problems or heat related problems. You will NOT have to use heat shielding of any kind.

The TRI-Y headers come with header nuts & bolts needed for installation but DOES NOT COME WITH HEADER GASKETS. We recommend Earl's Pressure Master Gasket from Summit Racing, part number EAR-29DA3BERL. They retail for $41.69 before shipping and feature a re-usable aluminum frame with a replaceable graphite center. The converters bolt to the headers and cat-back exhaust via gasket-less ball-socket flanges. The converters reside directly across from one another on opposite sides of the transmission housing.

The 2 1/2" small body converter, (which is the one used with the TRI-Y system) flow 590 cfm (cubic feet per minute). We fabricate converters specifically for our custom headers systems. The 1996 Impala SS uses four oxygen sensors. Two before the converters and two after. Our high flow metallic core converters are also available in configurations for both the 94/95 model years. The stock converters may not be used with the TRI-Y headers due to the extended length of the header tubes. There is a space restriction on the drivers side, so modification to the stock converters would be required.  We also have extended hook-up pipes that replace the cats and bolt to the headers and cat-back exhaust via ball-flange sockets. (For off-road use ONLY!).

We now offer a complete custom SpinTech exhaust from the heads all the way to the tailpipes. With the purchase of a complete system there should be no welding or cutting required. (Though some vehicles vary). Systems are available with or without resonators.

The install time for the TRI-Y headers will range from four to six hours, depending on your mechanical ability. Only basic tools are required.

CHROMEX is a ceramic coating which mimics a chrome finish. It is rated to 1300° Fahrenheit and reduces radiated heat under the hood tremendously, as well as improving scavenging, (rate and method of exhaust gas flow through the header tubes). CERMACHROME contains aluminum flake which is polished to allow the polished metallic finish.

A lifetime warranty is offered on the TRI-Y headers but only if one of the ceramic finishes is applied.

I hope I was able to answer all your questions satisfactory. If you would like to purchase our TRI-Y headers, we require payment in advance. Headers are custom built upon order and take about 3-4 weeks to ship. We accept credit cards or you may pay by check/money order or PayPal.com.