Circuit Werks
All Circuit Werks Products
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90° Degree O2 CEL Fix V2 Adapters/Spacers Lambda/Oxygen Sensor 
Sale90° Degree O2 CEL Fix V2 Adapters/Spacers Lambda/Oxygen Sensor
Regular price $34.99 Sale price $29.9990° Degree O2 CEL Fix V2 Adapters/Spacers Lambda/Oxygen Sensor
Sale price $29.99 Regular price $34.99 -
99-05 Volkswagen GOLF/JETTA/BEETLE MK4 1.9T TDI DIESEL ALH 2.5" Turbo Downpipe 
Sold out99-05 Volkswagen GOLF/JETTA/BEETLE MK4 1.9T TDI DIESEL ALH 2.5" Turbo Downpipe
$449.9999-05 Volkswagen GOLF/JETTA/BEETLE MK4 1.9T TDI DIESEL ALH 2.5" Turbo Downpipe
$449.99 -
1997-2005 Volkswagen Golf/Jetta/Beetle MK4 1.8T 1.8L Turbo Catless Downpipe GLS 
Sale1997-2005 Volkswagen Golf/Jetta/Beetle MK4 1.8T 1.8L Turbo Catless Downpipe GLS
Regular price $156.99 Sale price $134.991997-2005 Volkswagen Golf/Jetta/Beetle MK4 1.8T 1.8L Turbo Catless Downpipe GLS
Sale price $134.99 Regular price $156.99 -
05-07 Mazda Speed 6 3" Outlet Turbo VERSION 2 Downpipe 
05-07 Mazda Speed 6 3" Outlet Turbo VERSION 2 Downpipe
$399.9905-07 Mazda Speed 6 3" Outlet Turbo VERSION 2 Downpipe
$399.99 -
2008-2015 Mitsubishi Evolution 10 EVO X 3" Test Pipe w/ CEL FIX 
Sold out2008-2015 Mitsubishi Evolution 10 EVO X 3" Test Pipe w/ CEL FIX
Regular price $244.99 Sale price $199.992008-2015 Mitsubishi Evolution 10 EVO X 3" Test Pipe w/ CEL FIX
Sale price $199.99 Regular price $244.99 -
06-14 Golf GTi MK6 MKVI 2.0T Exhaust Volkswagen Turbo DeCat Downpipe 2.0L MK 6 (CCTA) 
Sale06-14 Golf GTi MK6 MKVI 2.0T Exhaust Volkswagen Turbo DeCat Downpipe 2.0L MK 6 (CCTA)
Regular price $299.99 Sale price $159.9906-14 Golf GTi MK6 MKVI 2.0T Exhaust Volkswagen Turbo DeCat Downpipe 2.0L MK 6 (CCTA)
Sale price $159.99 Regular price $299.99 -
05-08 Porsche Boxster & Cayman 987 V2 Catback Exhaust 987.1 S 
Sale05-08 Porsche Boxster & Cayman 987 V2 Catback Exhaust 987.1 S
Regular price $999.99 Sale price $899.9905-08 Porsche Boxster & Cayman 987 V2 Catback Exhaust 987.1 S
Sale price $899.99 Regular price $999.99 -
2011-2012 BMW 335i, 335xi E90 E92 N55 Catless Downpipe 
Sale2011-2012 BMW 335i, 335xi E90 E92 N55 Catless Downpipe
Regular price $262.99 Sale price $209.992011-2012 BMW 335i, 335xi E90 E92 N55 Catless Downpipe
Sale price $209.99 Regular price $262.99 -
02-06 Acura RSX, 03-06 Honda Element Outer Extended Tie Rods End DC5 
Sale02-06 Acura RSX, 03-06 Honda Element Outer Extended Tie Rods End DC5
Regular price $84.99 Sale price $69.9902-06 Acura RSX, 03-06 Honda Element Outer Extended Tie Rods End DC5
Sale price $69.99 Regular price $84.99 -
00-04 Porsche Boxster 986 2.7/3.2 Straight Test Pipes 
Sale00-04 Porsche Boxster 986 2.7/3.2 Straight Test Pipes
Regular price $274.99 Sale price $219.9900-04 Porsche Boxster 986 2.7/3.2 Straight Test Pipes
Sale price $219.99 Regular price $274.99 -
03-20 Nissan 350Z 370Z Fairlady Resonated Y Pipe Exhaust 
Sale03-20 Nissan 350Z 370Z Fairlady Resonated Y Pipe Exhaust
Regular price $599.99 Sale price $499.9903-20 Nissan 350Z 370Z Fairlady Resonated Y Pipe Exhaust
Sale price $499.99 Regular price $599.99 -
97-04 Porsche Boxster 986 V2 Polished Catback Exhaust System w/ C Pipes 
Sold out97-04 Porsche Boxster 986 V2 Polished Catback Exhaust System w/ C Pipes
$799.9997-04 Porsche Boxster 986 V2 Polished Catback Exhaust System w/ C Pipes
$799.99 -
06-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Catless Exhaust Resonated Turbo Downpipe VI 
Sold out06-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Catless Exhaust Resonated Turbo Downpipe VI
Regular price $356.99 Sale price $349.9906-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Catless Exhaust Resonated Turbo Downpipe VI
Sale price $349.99 Regular price $356.99 -
2013-2018 Ford Focus ST Resonated Catless 3" Downpipe 
Sold out2013-2018 Ford Focus ST Resonated Catless 3" Downpipe
Regular price $424.99 Sale price $339.992013-2018 Ford Focus ST Resonated Catless 3" Downpipe
Sale price $339.99 Regular price $424.99 -
2013-2018 Ford Focus ST 3" Straight Non Resonated Downpipe 
Sold out2013-2018 Ford Focus ST 3" Straight Non Resonated Downpipe
Regular price $374.99 Sale price $299.992013-2018 Ford Focus ST 3" Straight Non Resonated Downpipe
Sale price $299.99 Regular price $374.99 -
2012-2017 BMW N26 228i/328i/428i/428i SULEV xDrive F32 2.0L DOWNPIPE 
Sale2012-2017 BMW N26 228i/328i/428i/428i SULEV xDrive F32 2.0L DOWNPIPE
Regular price $237.99 Sale price $199.992012-2017 BMW N26 228i/328i/428i/428i SULEV xDrive F32 2.0L DOWNPIPE
Sale price $199.99 Regular price $237.99 -
06-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Exhaust Straight Turbo Downpipe VI 
Sold out06-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Exhaust Straight Turbo Downpipe VI
Regular price $343.99 Sale price $274.9906-14 Volkswagen Golf MK6 MKVI GTi CBFA 2.0T Exhaust Straight Turbo Downpipe VI
Sale price $274.99 Regular price $343.99 -
Universal Mini Catted Lambda/Oxygen Sensor o2 CEL Fix Adapter 
SaleUniversal Mini Catted Lambda/Oxygen Sensor o2 CEL Fix Adapter
Regular price $74.99 Sale price $59.99Universal Mini Catted Lambda/Oxygen Sensor o2 CEL Fix Adapter
Sale price $59.99 Regular price $74.99 -
1999-2006 Audi 1.8T TT Quattro 180HP Stainless 3" Turbo Exhaust Downpipe MKI 
Sale1999-2006 Audi 1.8T TT Quattro 180HP Stainless 3" Turbo Exhaust Downpipe MKI
Regular price $249.99 Sale price $199.991999-2006 Audi 1.8T TT Quattro 180HP Stainless 3" Turbo Exhaust Downpipe MKI
Sale price $199.99 Regular price $249.99 -
2016-2021 Honda Civic 1.5L Turbo Downpipe + Front Pipe Combo 
Sale2016-2021 Honda Civic 1.5L Turbo Downpipe + Front Pipe Combo
Regular price $749.99 Sale price $599.992016-2021 Honda Civic 1.5L Turbo Downpipe + Front Pipe Combo
Sale price $599.99 Regular price $749.99 -
2015-2021 Mercedes Benz C200 C250 C300 W205 M274 GLC 250 X253 E300 E250 E200 W213 Catless Downpipe 
Sold out2015-2021 Mercedes Benz C200 C250 C300 W205 M274 GLC 250 X253 E300 E250 E200 W213 Catless Downpipe
$399.992015-2021 Mercedes Benz C200 C250 C300 W205 M274 GLC 250 X253 E300 E250 E200 W213 Catless Downpipe
$399.99 -
2012-2017 BMW N20 328xi 328i 320i F30 F31 F34 2.0L DOWNPIPE 
Sale2012-2017 BMW N20 328xi 328i 320i F30 F31 F34 2.0L DOWNPIPE
Regular price $249.99 Sale price $199.992012-2017 BMW N20 328xi 328i 320i F30 F31 F34 2.0L DOWNPIPE
Sale price $199.99 Regular price $249.99 -
99-05 VW JETTA/BEETLE/GOLF 1.9L MK4 TDI ALH 1.9L TURBO HIGH FLOW RESONATED DOWNPIPE 
Sale99-05 VW JETTA/BEETLE/GOLF 1.9L MK4 TDI ALH 1.9L TURBO HIGH FLOW RESONATED DOWNPIPE
Regular price $419.99 Sale price $349.9999-05 VW JETTA/BEETLE/GOLF 1.9L MK4 TDI ALH 1.9L TURBO HIGH FLOW RESONATED DOWNPIPE
Sale price $349.99 Regular price $419.99 -
05-08 Porsche Boxster Cayman 987.1 Catback Exhaust 
Sold out05-08 Porsche Boxster Cayman 987.1 Catback Exhaust
Regular price $499.99 Sale price $449.9905-08 Porsche Boxster Cayman 987.1 Catback Exhaust
Sale price $449.99 Regular price $499.99
