The Leading Source for VW OEM and Aftermarket Parts

Engine | Exhaust Downpipes and Headers

SportTuned Mk4 1.8T Downpipe

Of course, there are other 1.8T downpipes on the market, but we felt the others weren't good enough for us to sell. One of the main issues we have with other downpipes on the market is the catalytic convertor many use: a conventional ceramic substrate cat.

VW hasn't used a ceramic cat for many, many years, and never used it on a VR6, G60, or 1.8T model...why? Because there's something better: a metal substrate cat.

Metal cats flow incredibly well, because they have almost no frontal area (the area that the exhaust gas must pass by), compared to ceramic-based cats. Also, ceramic cats cannot hold a candle to a metal cat when subjected to the high temperatures that a turbo emits. Bottom line, you won't find a better catalyst than the one that's already on your VW. So why pay for a downpipe with a low-tech catalyst that is not emissions legal?

Our downpipe is a direct replacement for the front section of the stock downpipe. Fitment to your car requires that your stock catalyst be cut off the downpipe and welded to the SportTuned version. A very simple operation for most muffler shops and 100% legal. We include measurements for the process.

Constructed entirely of T304 Stainless, our 2.5-inch SportTuned Downpipe is a street legal way to get a great power gain, especially on cars that have maxxed out their bolt-on options and are still looking for more power. Gains on stock cars with stock exhausts are around 3-4 hp, but with a more boost and a bigger exhaust, gains can be much higher, as much as 10-15hp.

Kit includes turbo to downpipe gasket.

Features:

• CNC machined flange
• Englarged flange-to-flex transition
• Special OEM 2.5-inch flex coupler, made by the supplier to VW, for true OE durability.

Description	Part Number	Price	Purchase
SportTuned Mk4 1.8T Downpipe	10.251.180K	$219.95	Add to Basket

Autotech Tri-Y Headers

For those who desire a classic tubular header, the Autotech header has all the features that you'll need. It has been proven in dynamometer testing to improve the power output of even stock engines; as well as help the performance of fully modified powerplants. The 4-into-2-into-1 "Tri-Y" design allows the optimum in scavenging effect. Designed to improve low and mid-range performance immensely, while quickening throttle response. All Autotech Headers offer these advantages:

• Heavy 14 gauge steel tubing throughout
• 1-piece head flange for proper sealing at the head
• Laser-cut head flanges for superior fit
• Built-in flex joints for durability
• Mitre cut primary-to-secondary merges used for superior flow over cheaper 2-1 collectors

Here's a detail of what a mitre-cut merge looks like. Extra labor going into the making of this pays off in performance.

All Autotech Headers come complete with metal faced OEM gaskets, hardware and instructions.

SportTuning Tip: Check Your Engine Mounts
Before ordering one of your hand-crafted headers, make sure to check the condition of your car's engine mounts. Headers, in general, are more sensitive to engine alignment than the factory manifold/downpipe, so proper engine position is crucial to insure hassle-free performance. If your car has a broken or worn engine mount, the motor may sag from side to side or from front to rear, preventing the header from correctly fastening to the exhaust system, or causing it to rub against other components. If the car has accumulated high mileage, or is driven hard, we recommend that you invest in new performance engine mounts or OE replacement mounts.

Mk2 Chassis

A superior quality Tri-Y header for catalyst equipped Mk2 chassis vehicles. Features like our mitre-cut merges and 1-piece Laser-cut head flange are retained from our Mk1 chassis header. Heavy 14 gauge tubing is used as well. This header is now titanium ceramic coated for better heat retention and durability and aesthetics. Our header replaces the stock manifold and downpipe, bolting directly to the catalytic convertor. Provision is made for all emissions equipment. Provides gains of up to 10 horsepower, depending on model and engine type.

Mk2 16V

Autotech's Tri-Y application for the Mk2 chassis cars with either the 1.8L or 2.0 L 16V. Features the same bulletproof design as our 8V Mk2 header, and is also titanium ceramic coated. Quicker throttle response and a gain of up to 7 horsepower over stock.

Works great in conjunction with our High Flow Catalytic Convertor.

Mk2 8V

Direct-Fit: Golf 2 1988-92 with PF engine; Golf 2 1990-92 CA only RV engine; Jetta 2 1985-92 with RD, PF engines.

Adapted Fit: All other Golf 2 and Jetta 2 models can be fitted with the header when used with the bolt-on style, large inlet catalytic convertor, 10.131.22915 or 10.131.22920 and must also use Autotech adaptor kit 10.251.198K, including the correct metal seal ring and longer flange bolts.

Description	Part Number	Price	Purchase
Tri-Y Header, Mk2 8V (incl hardware kit)	10.251.132K	$449.95	Add to Basket
Tri-Y Header Hardware kit (does not incl adaptor flange)	10.251.132HK	49.95	Add to Basket
Tri-Y Header Adaptor Flange Only (zinc plated)	10.251.132.01K	49.95	Add to Basket
Tri-Y Header Adaptor Kit	10.251.198K	19.95	Add to Basket

Mk1 Chassis

Mk1 Tri-Y Header

Autotech's Mk1 Tri-Y Header has served the test of time. With over 15 years of production behind it, it has become a benchmark of performance and value. Strong mid-range gains and a healthy top-end are its signature. Provision for all emissions equipment is standard.

Fits 1975-89 8V Rabbit, Scirocco, and Jetta 1. Does not fit 1990-93 Cabriolet.

Works great in conjunction with our High Flow Catalytic Convertor.

Our HD polyurethane front engine mount is highly recommended.

1990-1993 Cabriolets feature a unique one-piece downpipe/catalytic convertor that does not allow for a bolt-on installation of the Autotech Tri-Y header. To use the Tri-Y header and retain a catalytic convertor on these models, Autotech’s High Flow Catalytic Convertor part number 10.131.22918 and Cat-Back Exhaust System part number 10.297.205K must be installed in addition.

Header Brace Kit

The brace kit is recommended on 1982 and later Mk1 chassis models originally equipped with a ball-dash socket manifold and downpipe. Mounts between the engine block and header for support.

Description	Part Number	Price	Purchase
Header Brace Kit, Mk1	10.251.197K	49.95	Add to Basket

SportTuned Mk1 Downpipe

This high flowing dual downpipe is designed to fit catalyst-equipped Mk1 Chassis cars with 8V engines from 1976 through 1989. Constructed of heavy 14 gauge steel, it features a 3 layer collar-joint to absorb vibration. This downpipe mounts to early U.S. twin-outlet exhaust manifolds found on 1975 through 1981 cars. It is designed to directly replace the OE downpipe and flextube. Comes with metal-faced gaskets and hardware. Power gain is from 5 to 8 horsepower, depending on model.

Works great in conjunction with our High Flow Catalytic Convertor.

Our HD polyurethane front engine mount is highly recommended.

Description	Part Number	Price	Purchase
SportTuned Mk1 Downpipe	10.251.004K	$199.95	Add to Basket

SportTuned Stainless Exhaust Studs

Autotech offers a cure for your broken, rusty exhaust stud headaches; our own stainless steel exhaust studs! These make a great upgrade on any VW (perfect when changing your manifold/header). These very high quality studs are made from 303 stainless material. The threads are rolled, ensuring greater strength. M8x30.

Our SS studs are designed to fit nearly every watercooled engine application, from 4 to 6 cylinders.

Description	Part Number	Price	Purchase
SS Exhaust Manifold Stud Set, 2.5L 5-cyl (15pcs.) 2005.5>	10.251.225K	$79.95	Add to Basket
SS Exhaust Manifold Stud Set, 24V VR6 (14pcs) 2002-05	10.251.220K	74.95	Add to Basket
SS Exhaust Manifold Stud Set, 1.8T (13pcs) 1997-2005	10.251.218K	69.95	Add to Basket
SS Exhaust Manifold Stud Set, Audi 5-cyl & 12V VR6 (10pcs)	10.251.210K	54.95	Add to Basket
SS Exhaust Manifold Stud Set, 4-cyl 8V/16V (8pcs) 1974-2005	10.251.200K	44.95	Add to Basket
SS Exhaust Manifold Stud, M8x30 (single unit)	N.044.411.SS	6.00	Add to Basket