Name: TEC Decat Front / Header Pipe &amp; Gasket - BSA Goldstar 650
Brand: TEC
SKU: B65-DE-CAT-KIT
Availability: InStock

TEC Decat Front / Header Pipe & Gasket – BSA Goldstar 650

Rated 4.8 out of 5 based on 5 customer ratings

(5 customer reviews)

Important: If your bike is Euro 5+ (late 2025 onward), it will have an extra O2 sensor. If this is the case, this pipe is not suitable your bike.

NOTE – This listing is for the front pipe only to be used with the OE silencer only, we sell a Full Exhaust System for these bikes, click here for the full kit.

Premium Materials: Crafted from full 304 stainless steel for durability.

Exclusive TEC Design: Unique and manufactured by TEC. Designed to closely hug the motor and cover the void left by the cat for a cleaner look. Clamps seamlessly to the OE silencer and the joint can be covered by the optional joint cover.

Fittings Included:

1x Stainless Steel Decat Front Pipe
1x Head to Front-pipe Gasket
1x Stainless Steel Exhaust Clamp
(Optional) Stainless Joint Cover Heat Shield & Clamp

No ECU Modification Required: No retuning required.

Compatibility: Can only be used with the original BSA silencer.

Noise Options: With the standard baffle it will be slightly louder as the exhaust is not running through the cat. If you want it even louder and boomy, you can remove the baffle from the silencer but we do not recommend this. We also offer our hi-flow baffle which brings the volume down slightly (compared to no baffle) and lowers the booming and gives a nicer sound.

Weight Savings: Significantly lighter – as there is no cat, it is much lighter than the original.

Cooler Running: The bike runs much cooler due to the hot cat not being directly under the engine.

Rating

4.8 out of 5

Based on 5 Reviews

cedric C.

May 27, 2026

All fitted perfectly, Kept it in the packaging sleeve during fitting to keep oily hands from touching product. Did still discolour when running for ECU calibration, as recommended. One small point and attention to detail, 3 rubber inserts or similar to fill redundant holes would be of benefit it would not attract the eye to empty threaded holes and would stop the threads from being filled with road gunge I have placed black rubber inserts in mine

Alan S.

November 10, 2025

Decat header

Arrived really fast , great fit no messing about straight on feels and looks nice quality pipe , also fit it with the short baffle in the standard silencer runs and ride and sounds great 10/10 tec bike

martin B.

November 6, 2025

All good

Jules T.

October 18, 2025

BSA sound

Installed the decat front pipe to original exhaust with hi flow baffle It sounds great, very good likeness to a British single. It’s loud but not like my Harley with straight thru pipes ! For me its just right!

Mick F.

October 10, 2025

Gold Star decat pipe.

Very quick delivery. A quality item and easy to fit. Fitted the free flow baffle at same time. Really pleased with the look and sound. Much more responsive now. Thank you.

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