{"product_id":"exhaust-headers-for-vw-jetta-golf-1988-1999-1-8l-2-0l","title":"Exhaust Headers for Volkswagen Jetta Golf (1988-1999) 1.8L 2.0L Engines","description":"\u003ch2\u003eHigh-Flow Mandrel-Bent Exhaust Headers for 1988-1999 Volkswagen Jetta, Golf (ABA\/ACC Mk2\/Mk3)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Replaces the restrictive factory cast iron manifold with high-velocity T-304 stainless steel primaries to improve exhaust scavenging and reduce backpressure on 8-valve SOHC engines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jetta, Golf Exhaust Manifold Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory exhaust manifold on the Mk2 and Mk3 Volkswagen 1.8L and 2.0L platforms is a primary point of restriction. Constructed from heavy cast iron, the OEM log-style design prioritizes engine bay packaging over flow dynamics. The internal casting often features rough flash and abrupt angles that cause exhaust gas turbulence, leading to high pumping losses and increased cylinder head temperatures. Furthermore, these cast units are prone to thermal fatigue, which commonly results in hairline stress fractures and audible exhaust leaks that can disrupt O2 sensor readings and fuel trim accuracy. For those running the 8-valve ABA or ACC powerplants, the stock manifold effectively chokes the engine's ability to breathe at higher RPMs.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese headers are engineered from T-304 full stainless steel, providing superior resistance to oxidation and corrosion compared to mild steel alternatives. The 1.50\" primary tubes are CNC mandrel-bent, ensuring a consistent internal diameter throughout every radius to maintain laminar flow. By utilizing 16-gauge wall piping and TIG-welded construction, this header offers the structural integrity required to handle high EGTs without warping. The CNC-machined flange ensures a true, flat mating surface against the cylinder head to prevent gasket blowout. Designed for 8-valve motors only, this setup features an integrated O2 sensor bung and a 2.5\" outlet with a 3-bolt flange, optimizing the scavenging effect where the pulse from one cylinder helps pull the exhaust from the next, resulting in improved throttle response and a broader powerband.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1988-1999 Volkswagen Jetta, Golf\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1.8L\/2.0L SOHC (ABA\/ACC\/ABS) \/ Mk2 (A2), Mk3 (A3)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e100-115 hp \/ 107-122 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUl105FU55LL166NA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFor Volkswagen Golf 1988-1998 1.8L\/2.0L SOHC Engines\u003c\/li\u003e\n  \u003cli\u003eFor Volkswagen Jetta 1986-1999 1.8L\/2.0L SOHC Engines\u003c\/li\u003e\n  \u003cli\u003eNote: Fits 8-Valve (8V) Motors Only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Volkswagen Precision Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned for the European enthusiast, this header provides a direct-fit solution that respects OEM sensor placement while delivering a significant increase in flow efficiency. The stainless steel construction ensures long-term durability and a clean aesthetic, providing a reliable performance upgrade without the risk of Check Engine Lights (CEL) when properly installed with existing oxygen sensors.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47996645376248,"sku":"DS-E9K0LM251","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-for-vw-jetta-golf-1988-1999-1-8l-2-0l-1.webp?v=1771266788","url":"https:\/\/performancechiptuning.com\/products\/exhaust-headers-for-vw-jetta-golf-1988-1999-1-8l-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}