{"product_id":"streetfighter-lt4-cylinder-heads-full-cnc-port-and-flow","title":"StreetFighter LT4 Cylinder Heads – SFP Stage 1","description":"\u003cp\u003eStreetFighter are proud to release our newly developed SFP (Street Fighter Power) high flow LT4 cylinder heads for the new HSV ZL1 Camaro (2019+).\u003c\/p\u003e\u003cp\u003eAfter many months in design and development we have produced the highest flowing LT4 cylinder heads available. By utilising cylinder head design software we were able to model air flow through the head ports and past the valves. With this we have achieved high flow capabilities across the entire rev range and for optimum power.\u003c\/p\u003e\u003cp\u003eOur exclusive design is used to fully CNC the intake and exhaust ports creating a custom intake and exhaust port radius and fully blends the intake and exhaust bowls. Each of our cylinder heads are then individually bench flowed to ensure we have achieved the expected and advertised results of over 360 cfm.\u003c\/p\u003e\u003cp\u003eOur quality control is carefully regulated utilising OEM computer data along with real world sectioning samples to ensure minimum wall thickness is maintained.\u003c\/p\u003e\u003cp\u003eEvery SFP LT4 cylinder head receives:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrecision 3 angle valve job\u003c\/li\u003e\n\u003cli\u003eFull surface machining\u003c\/li\u003e\n\u003cli\u003eChamber cc sizing\u003c\/li\u003e\n\u003cli\u003eDe-burring\u003c\/li\u003e\n\u003cli\u003ePressure testing\u003c\/li\u003e\n\u003cli\u003eProfessional assembly\u003cbr\u003e\u003chr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eSTANDARD vs. SFP STAGE 1 HEADS\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe test bench data below shows the standard LT4 cylinder heads data. We then retested the heads after the SFP Stage 1 process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eStandard LT4 Cylinder Heads\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIntake port @ .650 lift = 304 cfm\u003c\/li\u003e\n\u003cli\u003eExhaust port @ .650 lift = 213 cfm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSFP Stage 1 Cylinder Heads \u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIntake port @ .650 lift = 355 cfm\u003c\/li\u003e\n\u003cli\u003eExhaust port @ .650 lift = 243 cfm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOur SFP Stage 1 LT4 cylinder heads are capable of supporting over 1000hp with supporting upgrades. Our test results show that we have improved the head design and flow from the standard level of 640hp.\u003c\/p\u003e\u003cp\u003eTake a look at the before and after data sheet here: SFP1 LT4 Ported Heads Data Sheet\u003c\/p\u003e\u003cp\u003eThe SFP Stage 1 cylinder heads are fully machined and CNC ported utilising the standard valves.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSFP Dual Spring Kit Upgrade Option\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIf required we can also replace the standard valves springs with our own SFP developed performance dual springs, chrome moly retainers, collets and seal kit. Spring heights are set and all tolerances checked on full assembly.\u003c\/p\u003e\u003cp\u003eThe SFP spring kit is developed to work perfectly with the boost levels of the standard supercharger and camshaft. They also ensure maximum performance when utilising high boost levels, high lift camshafts and maximum revs.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003e\u003cstrong\u003eStreetFighter LT4 Cylinder Heads\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe StreetFighter LT4 cylinder head package includes:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFull cylinder head re-surfacing\u003c\/li\u003e\n\u003cli\u003e5 axis CNC port machining and blending\u003c\/li\u003e\n\u003cli\u003eStandard LT4 valves with radius machining and seat work\u003c\/li\u003e\n\u003cli\u003eFull assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOptions:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSFP Dual springs, chrome moly retainers, collets, seals (kit)\u003c\/li\u003e\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eChangeover core option\u003c\/h3\u003e\u003cp\u003eSo you can get your StreetFighter LT4 head upgrade in the quickest time possible, we offer a \u003cem\u003e\u003cstrong\u003eChangeover Core\u003c\/strong\u003e\u003c\/em\u003e option. We will send you a ready-to-go set of SFP Stage 1 LT4 heads, you then send us your standard cylinder heads in return. Changeover core charge of $4,800 is 100% refundable within 2 weeks on return to us of your standard LT4 heads (upon satisfactory inspection by our technicians). Cylinder heads must be returned with all inlet and exhaust valves. Select the \u003cem\u003e\u003cstrong\u003eChangeover Core\u003c\/strong\u003e\u003c\/em\u003e option from the dropdown list below.\u003c\/p\u003e\u003cp\u003eWe also have the option for you to send us your standard heads, and we will upgrade them to SFP Stage 1 specifications. Simply order, send us your standard LT4 heads, and we will freight back to you upon completion. This generally takes 2-3 weeks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE: \u003c\/strong\u003e\u003cem\u003e Customer will be liable for all freight costs. Please ensure that when returning your cylinder heads and valves that you correctly and securely package them individually of each other to prevent any damage. Cylinder heads and valves received damaged in any way will not be refunded by StreetFighter. It remains the responsibility of the customer and freight provider to ensure the cylinder heads and valves are delivered in satisfactory condition.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck fitment before you order.\u003c\/strong\u003e Call KPM Motorsport on \u003ca href=\"tel:0882999998\"\u003e(08) 8299 9998\u003c\/a\u003e or \u003ca href=\"\/pages\/contact\"\u003esend us an enquiry\u003c\/a\u003e with your vehicle details and we'll confirm it suits your car.\u003c\/p\u003e","brand":"StreetFighter","offers":[{"title":"SFP Stage 1 LT4 Cylinder Head Pair","offer_id":67875154952558,"sku":null,"price":3450.0,"currency_code":"AUD","in_stock":true},{"title":"SFP Stage 1 LT4 Cylinder Head Pair + SFP Dual Spring Kit","offer_id":67875154985326,"sku":null,"price":4350.0,"currency_code":"AUD","in_stock":true},{"title":"SFP Stage 1 LT4 Cylinder Head Pair (Changeover Core)","offer_id":67875155018094,"sku":null,"price":7782.0,"currency_code":"AUD","in_stock":true},{"title":"SFP Stage 1 LT4 Cylinder Head Pair (Changeover Core) + SFP Dual Spring Kit","offer_id":67875155050862,"sku":null,"price":8380.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1020\/4889\/1246\/files\/kpm-old-LT4_Heads_Product_Listing.jpg?v=1792980116","url":"https:\/\/kpmmotorsport.com.au\/products\/streetfighter-lt4-cylinder-heads-full-cnc-port-and-flow","provider":"KPM Motorsport","version":"1.0","type":"link"}