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Mk3 VR6 High Flow Cat




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Replacing the catalytic converter on your VR6?

Our VR6 high flow cat is the performance fit! The stock catalytic converter on most VR6 vehicles is a lengthy 600 cell catalyst. While failures are infrequent, replacement with a high-flow cat yields better exhaust flow & mild HP gains. Our VR6 high flow cat uses a Magnaflow 200 cell metal cat in a spun stainless steel body. A CNC machined flange & TIG welded construction result in a perfect fit every time. Auto parts store replacement cats are guaranteed to 'pretty much' fit & basically 'work'. Why settle?

Our VR6 high flow cat is available reduced to fit the stock sleeve clamp, or 2.5" through to fit 2.5" cat-backs. A fresh OEM gasket & replacement hardware is included with every pipe. Two oxygen sensor bungs are welded in and a plug is included for the extra. OBD1 cars use the pre-cat bung. OBD2 cars use the post-cat bung. Though based on the mk3 VR6 cat, our high flow cat fits a wide range of VWs. Check out the application guide below to choose the correct cat for your vehicle.

42 High Flow Cat:	Fits:

Mk3 VR6 High Flow Cat	VW mk3 Jetta, Golf, GTI 1994-1999 VR6 & 2.0
	VW mk2 Jetta, Golf, GTI 1985-1992 8v & 16v
	VW B3/B4 Passat up to 1997 VR6, 2.0 & 16v
	VW Corrado 1989-1995 G60

Construction

Magnaflow 200 cell 409 stainless steel cat
14 gauge aluminized steel tubing
CNC machined flange mates exactly to the stock flange
TIG welded construction
2.5" piping reduces to stock 2.150" band clamp for a bolt-on fit

Fitment

Fits exactly like the stock cat. No cutting or custom fitment required
Oxygen sensor bung location suits every vehicle without modification of heatsheilds or sensor wiring. OBD1 & OBD2? Don't worry, one model fits all.
Includes grade 5 hardware and OEM gasket
Available reduced to fit stock band clamp or 2.5" through
Installation Instructions included
Replacement sleeve clamps available

Available Options

Pipe Size
Ceramic Coating

Mk3 VR6 High Flow Cat - $195

Corrado SLC High Flow Cat - $195

Additional Information

Power Gains

A high flow cat won't be your ticket to 10's. However, we find this modification to be very worthwhile. All of our testing over the years has compared our test pipes to the factory cat. Using our test pipe we did a back to back test and found peak gains of 5whp and 6wtq on a normally modified all-motor VR6. Road testing of the high flow cats demonstrated power gains almost identical to the test pipes. We're obviously fans of our test pipes on the VR6, but long testing on multiple VR6s left us impressed. The raw sound and power of the VR6 with a test pipe was only slightly diminished. Hmm. Of course, individual power gains depend on the condition of the catalytic converter removed, the exhaust system used, and the condition of the motor. We wouldn't build them if they didn't work.

The Sound

Again, we're comparing our results to our long term use of test pipes and the dramatic sound difference between the stock cat and a test pipe. When we first fired up a test car we all said "wait, that's a cat?" The VR6 with a stock cat sounds muted and distant. The VR6 with a test pipe sounds like a monster. This cat lands right in the middle. The exhaust note becomes sharper & meaner. The overall volume of the exhaust increases, but not enough to cause a scene. Low rpm 'drone' inside the car is eliminated.

Legality

This catalytic converter is 49 state legal (excluding California)
Emissions compliance is the sole responsibility of the vehicle's owner.
May cause 'catalyst below efficiency' fault code and / or check engine light (CEL) to illuminate in the instrument cluster.

2.5" Through - Fitment Details

Our VR6 high flow cat is available in 2.5" through. This cat fits exactly like the original but lacks the reduction to stock band clamp size. This allows for a straight-through fitment when using 2.5" exhaust. Our 2.5" through cat terminates at the center of the stock band clamp. Many 2.5" cat-back exhaust systems for the mk3 VR6 have a built in reduction to the stock band clamp size. In this case, the cat-back exhaust system will need to be modified. The reduction will need to be removed, a 2.5" section of pipe added and a 2.5" band clamp added. Many cat-back exhaust systems begin at the center of the stock band clamp as 2.5". In this case no modification is required and a band clamp should be used. Due to the variances in aftermarket cat-back designs we cannot provide a 100% bolt-on 2.5" through cat for any or all aftermarket exhaust systems.

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Please Note

42's high flow cats are manufactured from scratch in Millersville, MD. We use high quality American made materials throughout our exhaust systems, manufacturing in-house every component possible. When necessary to outsource, American companies are chosen who manufacture their products in the USA. Our systems are built in our 4000 sq/ft facility by a team of 7 machinists, fabricators, and TIG welders trained to complete each system with exacting precision. Our TIG welders take their time, welding each joint with care. From design to manufacturing we never rush, cut corners, or take shortcuts. If you have any questions, concerns, or comments about our high flow cats please contact us by email: sales@42draftdesigns.com or telephone: 410.923.0411. Our telephone rings in the same building our systems are created. We are here to help.